fix: DEFECT-944 can not save after import && export

@@ -5050,10 +5050,9 @@ App.prototype.updateButtonContainer = function () {
 					this.importButton.setAttribute('id', 'thingskitImportButton');
 					mxUtils.write(this.importButton, '导入');
 					mxEvent.addListener(this.importButton, 'click', mxUtils.bind(this, function () {
-						this.currentFile.ui.actions.get('open').funct()
-						console.log(this)
+						this.currentFile.ui.actions.get('open').funct() 
 					}));
-					// this.leftContainer.appendChild(this.importButton);
+					this.leftContainer.appendChild(this.importButton);
 
 					// TODO thingsKit 导出案例
 					this.exportButton = document.createElement('div');
@@ -5083,7 +5082,7 @@ App.prototype.updateButtonContainer = function () {
 
 						savefiles(this.currentFile.data, '未命名.xml')
 					}));
-					// this.leftContainer.appendChild(this.exportButton);
+					this.leftContainer.appendChild(this.exportButton);
 
 					// TODO thingsKit 锁定 / 解锁 按钮
 					this.lockButton = document.createElement('div');

@@ -13297,4 +13297,4 @@ var ConnectionPointsDialog = function(editorUi, cell)
 	this.destroy = destroy;
 
 	this.container = div;
-};
\ No newline at end of file
+};

@@ -11719,18 +11719,29 @@
 				});
 				
 				window.openFile.setData(data, name);
-				window.openWindow(this.getUrl(), null, mxUtils.bind(this, function()
+				
+				// window.openWindow(this.getUrl(), null, mxUtils.bind(this, function()
+				// {
+				// 	if (currentFile != null && currentFile.isModified())
+				// 	{
+				// 		this.confirm(mxResources.get('allChangesLost'), null, fn,
+				// 			mxResources.get('cancel'), mxResources.get('discardChanges'));
+				// 	}
+				// 	else
+				// 	{
+				// 		fn();
+				// 	}
+				// }));
+				// TODO Thingskit不打开浏览器tab标签
+				if (currentFile != null && currentFile.isModified())
 				{
-					if (currentFile != null && currentFile.isModified())
-					{
-						this.confirm(mxResources.get('allChangesLost'), null, fn,
-							mxResources.get('cancel'), mxResources.get('discardChanges'));
-					}
-					else
-					{
-						fn();
-					}
-				}));
+					this.confirm(mxResources.get('allChangesLost'), null, fn,
+						mxResources.get('cancel'), mxResources.get('discardChanges'));
+				}
+				else
+				{
+					fn();
+				}
 			}
 		}
 		else

@@ -147,8 +147,7 @@ LocalFile.prototype.saveFile = function (title, revision, success, error, useCur
 	// Updates data after changing file name
 	if (!useCurrentData) {
 		this.updateFileData();
-	}
-
+	} 
 	var binary = this.ui.useCanvasForExport && /(\.png)$/i.test(this.getTitle());
 	this.setShadowModified(false);
 	var savedData = this.getData();
@@ -163,6 +162,12 @@ LocalFile.prototype.saveFile = function (title, revision, success, error, useCur
 	});
 
 	var doSave = mxUtils.bind(this, function (data) {
+		if(!this.fileHandle) {
+			this.fileHandle = {
+				kind: 'file',
+				name: '未命名.xml'
+			}
+		}
 		if (this.fileHandle != null) {
 			// Sets shadow modified state during save
 			if (!this.savingFile) {