feat(combo): adding disableClear on combo demo

Author: Konstantin Dinev

src/app/combo/combo.sample.html

@@ -105,6 +105,9 @@ <h1 class="combo-sample__title">Template items</h1>
             <igx-switch [(ngModel)]="autoFocusSearch"
                 >Automatic Search Focus</igx-switch
             >
+            <igx-switch [(ngModel)]="disableClear"
+                >Hide Clear Button</igx-switch
+            >
         </div>
 
         <igx-buttongroup>
@@ -148,6 +151,7 @@ <h1 class="combo-sample__title">Template items</h1>
             [allowCustomValues]="customValuesFlag"
             [autoFocusSearch]="autoFocusSearch"
             [disableFiltering]="disableFilteringFlag"
+            [disableClear]="disableClear"
             [displayKey]="valueKeyVar"
             [valueKey]="valueKeyVar"
             [groupKey]="valueKeyVar ? 'region' : ''"
@@ -219,6 +223,7 @@ <h1 class="combo-sample__title">
             [data]="items"
             [displayKey]="valueKeyVar"
             [disabled]="isDisabled"
+            [disableClear]="disableClear"
             [valueKey]="valueKeyVar"
             [groupKey]="valueKeyVar ? 'region' : ''"
             (selectionChanging)="handleSelectionChanging($event)"
@@ -234,6 +239,7 @@ <h1 class="combo-sample__title">
             [data]="items"
             [displayKey]="valueKeyVar"
             [disabled]="isDisabled"
+            [disableClear]="disableClear"
             [valueKey]="valueKeyVar"
             [groupKey]="valueKeyVar ? 'region' : ''"
         >

src/app/combo/combo.sample.ts

@@ -107,6 +107,7 @@ export class ComboSampleComponent implements OnInit, AfterViewInit {
     public disableFilteringFlag = false;
     public customValuesFlag = true;
     public autoFocusSearch = true;
+    public disableClear = false;
     public items: any[] = [];
     public values1: Array<any> = ['Arizona'];
     public singleValue = 'Arizona';