added entity names to dialog headers in

1) add rule node dialog component
2) add widget dialog component

ui-ngx/src/app/modules/home/components/dashboard-page/add-widget-dialog.component.html

@@ -18,7 +18,7 @@
 <form [formGroup]="widgetFormGroup" (ngSubmit)="add()" style="width: 900px;">
   <mat-toolbar color="primary">
     <h2 translate>widget.add</h2>
-    <span fxFlex></span>
+    <span fxFlex>: {{data.widgetInfo.widgetName}}</span>
     <div [tb-help]="helpLinkIdForWidgetType()"></div>
     <button mat-icon-button
             (click)="cancel()"

ui-ngx/src/app/modules/home/pages/rulechain/add-rule-node-dialog.component.html

@@ -18,7 +18,7 @@
 <form (ngSubmit)="add()" style="min-width: 650px;">
   <mat-toolbar color="primary">
     <h2 translate>rulenode.add</h2>
-    <span fxFlex></span>
+    <span fxFlex>: {{ruleNode.component.name}}</span>
     <div [tb-help]="helpLinkIdForRuleNodeType()"></div>
     <button mat-icon-button
             (click)="cancel()"