updated key to use textarea

Author: sumitdaga

src/app/components/add-value-form/add-value-form.component.html

@@ -10,10 +10,13 @@
 <div *ngIf="type !== 'String'" class="add-form-list">
   <div class="line" *ngFor="let v of getItemArray(); let i = index">
     <mat-form-field *ngIf="type === 'Hash Map'" style="flex-grow:0">
-      <input matInput placeholder="Key"
+      <textarea matInput placeholder="Key"
              [readonly]="isEditMode && !v.isNew"
              (change)="onValueChange()"
-             [(ngModel)]="getItemArray()[i].key">
+             [(ngModel)]="getItemArray()[i].key"
+             cdkTextareaAutosize
+             cdkAutosizeMinRows="1"
+             cdkAutosizeMaxRows="7"></textarea>
     </mat-form-field>
 
     <mat-form-field *ngIf="type === 'List' || type === 'Set' || type === 'Ordered Set' || type === 'Hash Map'">