UI: changed validation hints of add telemetry dialog to more precise

ui-ngx/src/app/modules/home/components/attribute/add-attribute-dialog.component.html

@@ -17,7 +17,7 @@
 -->
 <form [formGroup]="attributeFormGroup" (ngSubmit)="add()" style="min-width: 400px;">
   <mat-toolbar color="primary">
-    <h2>{{ title | translate }}</h2>
+    <h2>{{ (isTelemetry ? 'attribute.add-telemetry' : 'attribute.add') | translate }}</h2>
     <span fxFlex></span>
     <button mat-icon-button
             (click)="cancel()"
@@ -34,7 +34,7 @@
         <mat-label translate>attribute.key</mat-label>
         <input matInput formControlName="key" required>
         <mat-error *ngIf="attributeFormGroup.get('key').hasError('required')">
-          {{ 'attribute.key-required' | translate }}
+          {{ (isTelemetry ? 'attribute.telemetry-key-required' : 'attribute.key-required') | translate }}
         </mat-error>
         <mat-error *ngIf="attributeFormGroup.get('key').hasError('maxlength')">
           {{ 'attribute.key-max-length' | translate }}
@@ -42,7 +42,7 @@
       </mat-form-field>
       <tb-value-input
         formControlName="value"
-        requiredText="attribute.value-required">
+        [requiredText]="isTelemetry ? 'attribute.telemetry-value-required' : 'attribute.value-required'">
       </tb-value-input>
     </fieldset>
   </div>

ui-ngx/src/app/modules/home/components/attribute/add-attribute-dialog.component.ts

@@ -45,7 +45,7 @@ export class AddAttributeDialogComponent extends DialogComponent<AddAttributeDia
 
   submitted = false;
 
-  title = '';
+  isTelemetry = false;
 
   constructor(protected store: Store<AppState>,
               protected router: Router,
@@ -62,8 +62,7 @@ export class AddAttributeDialogComponent extends DialogComponent<AddAttributeDia
       key: ['', [Validators.required, Validators.maxLength(255)]],
       value: [null, [Validators.required]]
     });
-    this.title = this.data.attributeScope === LatestTelemetry.LATEST_TELEMETRY ?
+    this.isTelemetry = this.data.attributeScope === LatestTelemetry.LATEST_TELEMETRY;
-      'attribute.add-telemetry' : 'attribute.add'
   }
 
   isErrorState(control: FormControl | null, form: FormGroupDirective | NgForm | null): boolean {

ui-ngx/src/assets/locale/locale.constant-en_US.json

@@ -722,6 +722,8 @@
         "key-required": "Attribute key is required.",
         "value": "Value",
         "value-required": "Attribute value is required.",
+        "telemetry-key-required": "Telemetry key is required",
+        "telemetry-value-required": "Telemetry value is required",
         "delete-attributes-title": "Are you sure you want to delete { count, plural, =1 {1 attribute} other {# attributes} }?",
         "delete-attributes-text": "Be careful, after the confirmation all selected attributes will be removed.",
         "delete-attributes": "Delete attributes",