Improve dashboard edit button appearence depending on multiple conditions.

@@ -196,14 +196,13 @@
             </tb-dashboard-layout>
           </mat-drawer-content>
         </mat-drawer-container>
-        <section data-html2canvas-ignore fxLayout="row" class="layout-wrap tb-footer-buttons" fxLayoutAlign="start end">
-          <tb-footer-fab-buttons *ngIf="!embedded && !isMobileApp"
-                                 [fxShow]="!isAddingWidget && isEdit && !widgetEditMode"
+        <section data-html2canvas-ignore fxLayout="row" class="layout-wrap tb-footer-buttons" fxLayoutAlign="start end"
+                 *ngIf="!readonly">
+          <tb-footer-fab-buttons [fxShow]="!isAddingWidget && isEdit && !widgetEditMode"
                                  relative
                                  [footerFabButtons]="addWidgetFabButtons">
           </tb-footer-fab-buttons>
-          <button *ngIf="(isTenantAdmin() || isSystemAdmin()) && !forceFullscreen && !embedded && !isMobileApp"
-                  mat-fab color="accent" class="tb-btn-footer"
+          <button mat-fab color="accent" class="tb-btn-footer"
                   [ngClass]="{'tb-hide': !isEdit || isAddingWidget}"
                   [disabled]="isLoading$ | async"
                   (click)="saveDashboard()"
@@ -211,8 +210,7 @@
                   matTooltipPosition="above">
             <mat-icon>done</mat-icon>
           </button>
-          <button *ngIf="(isTenantAdmin() || isSystemAdmin()) && !forceFullscreen && !embedded && !isMobileApp"
-                  mat-fab color="accent" class="tb-btn-footer"
+          <button mat-fab color="accent" class="tb-btn-footer"
                   [ngClass]="{'tb-hide': isAddingWidget || (isLoading$ | async)}"
                   [disabled]="isLoading$ | async"
                   (click)="toggleDashboardEditMode()"

@@ -183,6 +183,7 @@ export class DashboardPageComponent extends PageComponent implements IDashboardC
   singlePageMode: boolean;
   forceFullscreen = this.authState.forceFullscreen;
 
+  readonly = false;
   isMobileApp = this.mobileService.isMobileApp();
   isFullscreen = false;
   isEdit = false;
@@ -403,6 +404,9 @@ export class DashboardPageComponent extends PageComponent implements IDashboardC
     this.widgetEditMode = data.widgetEditMode;
     this.singlePageMode = data.singlePageMode;
 
+    this.readonly = this.embedded || (this.singlePageMode && !this.widgetEditMode && !this.route.snapshot.queryParamMap.get('edit'))
+                    || this.forceFullscreen || this.isMobileApp || this.authUser.authority === Authority.CUSTOMER_USER;
+
     this.dashboardCtx.aliasController = new AliasController(this.utils,
       this.entityService,
       this.translate,