Refactoring OAuth2

@@ -37,7 +37,7 @@
                   <mat-expansion-panel [formGroupName]="i" [expanded]="last">
                     <mat-expansion-panel-header>
                       <mat-panel-title fxLayoutAlign="start center">
-                        {{ domain.get('domainName').value ? domain.get('domainName').value : ("admin.new-domain" | translate) }}
+                        {{ domain.get('domainName').value ? domain.get('domainName').value : ("admin.oauth2.new-domain" | translate) }}
                       </mat-panel-title>
                       <mat-panel-description fxLayoutAlign="end center">
                           <button mat-icon-button
@@ -211,9 +211,9 @@
                                         </mat-form-field>
 
                                         <div fxLayout="row" fxLayout.xs="column" fxLayoutGap.gt-xs="8px" *ngIf="getProviderName(registration) === 'Custom'">
-                                          <mat-form-field fxFlex class="mat-block">
+                                          <mat-form-field fxFlex class="mat-block" floatLabel="always">
                                             <mat-label translate>admin.oauth2.login-button-label</mat-label>
-                                            <input matInput formControlName="loginButtonLabel" required>
+                                            <input matInput formControlName="loginButtonLabel" placeholder="{{ 'admin.oauth2.login-button-label-1' | translate }}" required>
                                             <mat-error
                                               *ngIf="registration.get('loginButtonLabel').hasError('required')">
                                               {{ 'admin.oauth2.login-button-label-required' | translate }}
@@ -380,7 +380,7 @@
                                 [disabled]="(isLoading$ | async)"
                                 (click)="addRegistration(domain)"
                                 type="button">
-                          {{'admin.add-provider' | translate}}
+                          {{'admin.oauth2.add-provider' | translate}}
                         </button>
                       </div>
                     </ng-template>
@@ -396,7 +396,7 @@
                     [disabled]="(isLoading$ | async)"
                     (click)="addDomain()"
                     type="button">
-              {{'admin.add-domain' | translate}}
+              {{'admin.oauth2.add-domain' | translate}}
             </button>
             <button mat-button mat-raised-button color="primary"
                     [disabled]="(isLoading$ | async) || oauth2SettingsForm.invalid || !oauth2SettingsForm.dirty"

@@ -334,15 +334,19 @@ export class OAuth2SettingsComponent extends PageComponent implements OnInit, Ha
   }
 
   private prepareFormValue(formValue: OAuth2Settings[]): OAuth2Settings[]{
-    formValue.forEach((setting) => {
-      setting.clientRegistrations.forEach((registration) => {
-        registration.additionalInfo = JSON.stringify(registration.additionalInfo);
-        if (registration.id.id === null) {
-          delete registration.id;
-        }
-      });
+    const prepereValue = [];
+    formValue.forEach((setting, index) => {
+      if (this.clientDomains.at(index).dirty) {
+        setting.clientRegistrations.forEach((registration) => {
+          registration.additionalInfo = JSON.stringify(registration.additionalInfo);
+          if (registration.id.id === null) {
+            delete registration.id;
+          }
+        });
+        prepereValue.push(setting);
+      }
     });
-    return formValue;
+    return prepereValue;
   }
 
   confirmForm(): FormGroup {

@@ -123,59 +123,60 @@
         "domain-name": "Domain name",
         "domain-name-unique": "Domain name need to unique for the system.",
         "error-verification-url": "A domain name shouldn't contain symbols '/' and ':'. Example: thingsboard.io",
-        "add-domain": "Add domain",
-        "new-domain": "New domain",
-        "add-provider": "Add provider",
         "oauth2": {
-          "oauth2": "OAuth2",
-          "registration-id": "Registration ID",
-          "registration-id-required": "Registration ID is required.",
-          "registration-id-unique": "Registration ID need to unique for the system.",
-          "client-id": "Client ID",
-          "client-id-required": "Client ID is required.",
-          "client-secret": "Client secret",
-          "client-secret-required": "Client secret is required.",
           "access-token-uri": "Access token URI",
           "access-token-uri-required": "Access token URI is required.",
+          "activate-user": "Activate user",
+          "add-domain": "Add domain",
+          "add-provider": "Add provider",
+          "allow-user-creation": "Allow user creation",
+          "always-fullscreen": "Always fullscreen",
           "authorization-uri": "Authorization URI",
           "authorization-uri-required": "Authorization URI is required.",
-          "uri-pattern-error": "Invalid URI format.",
-          "scope": "Scope",
-          "redirect-uri-template": "Redirect URI template",
-          "redirect-uri-template-required": "Redirect URI template is required.",
-          "jwk-set-uri": "JSON Web Key URI",
-          "user-info-uri": "User info URI",
-          "user-info-uri-required": "User info URI is required.",
           "client-authentication-method": "Client authentication method",
-          "user-name-attribute-name": "User name attribute key",
-          "user-name-attribute-name-required": "User name attribute key is required",
-          "allow-user-creation": "Allow user creation",
-          "activate-user": "Activate user",
-          "type": "Mapper type",
+          "client-id": "Client ID",
+          "client-id-required": "Client ID is required.",
+          "client-secret": "Client secret",
+          "client-secret-required": "Client secret is required.",
+          "custom-setting": "Custom settings",
+          "customer-name-pattern": "Customer name pattern",
+          "default-dashboard-name": "Default dashboard name",
+          "delete-domain-text": "Be careful, after the confirmation a domain and all registration data will be unavailable.",
+          "delete-domain-title": "Are you sure you want to delete the domain '{{domainName}}'?",
+          "delete-registration-text": "Be careful, after the confirmation a registration data will be unavailable.",
+          "delete-registration-title": "Are you sure you want to delete the registration '{{name}}'?",
           "email-attribute-key": "Email attribute key",
           "email-attribute-key-required": "Email attribute key is required.",
           "first-name-attribute-key": "First name attribute key",
+          "general": "General",
+          "jwk-set-uri": "JSON Web Key URI",
           "last-name-attribute-key": "Last name attribute key",
-          "tenant-name-strategy": "Tenant name strategy",
+          "login-button-icon": "Login button icon",
+          "login-button-label": "Provider label",
+          "login-button-label-1": "Login with $(Provider label)",
+          "login-button-label-required": "Label is required.",
+          "login-provider": "Login provider",
+          "mapper": "Mapper",
+          "new-domain": "New domain",
+          "oauth2": "OAuth2",
+          "redirect-uri-template": "Redirect URI template",
+          "redirect-uri-template-required": "Redirect URI template is required.",
+          "registration-id": "Registration ID",
+          "registration-id-required": "Registration ID is required.",
+          "registration-id-unique": "Registration ID need to unique for the system.",
+          "scope": "Scope",
           "tenant-name-pattern": "Tenant name pattern",
           "tenant-name-pattern-required": "Tenant name pattern is required.",
-          "customer-name-pattern": "Customer name pattern",
-          "default-dashboard-name": "Default dashboard name",
-          "always-fullscreen": "Always fullscreen",
+          "tenant-name-strategy": "Tenant name strategy",
+          "type": "Mapper type",
+          "uri-pattern-error": "Invalid URI format.",
           "url": "URL",
-          "url-required": "URL is required.",
           "url-pattern": "Invalid URL format.",
-          "login-button-label": "Label (Login with ${label})",
-          "login-button-label-required": "Label is required.",
-          "login-button-icon": "Login button icon",
-          "delete-domain-title": "Are you sure you want to delete the domain '{{domainName}}'?",
-          "delete-domain-text": "Be careful, after the confirmation a domain and all registration data will be unavailable.",
-          "delete-registration-title": "Are you sure you want to delete the registration '{{name}}'?",
-          "delete-registration-text": "Be careful, after the confirmation a registration data will be unavailable.",
-          "login-provider": "Login provider",
-          "custom-setting": "Custom settings",
-          "general": "General",
-          "mapper": "Mapper"
+          "url-required": "URL is required.",
+          "user-info-uri": "User info URI",
+          "user-info-uri-required": "User info URI is required.",
+          "user-name-attribute-name": "User name attribute key",
+          "user-name-attribute-name-required": "User name attribute key is required"
         }
       },
     "alarm": {