Merge pull request #7883 from IgniteUI/SIvanova/change-filtering-icon

style(grid): change the default column header icon for ESF

Author: simeonoff

projects/igniteui-angular/src/lib/grids/headers/grid-header.component.html

@@ -7,7 +7,7 @@
     </ng-container>
 </span>
 <div class="igx-grid__th-icons" *ngIf="!column.columnGroup">
-    <igx-icon 
+    <igx-icon
         [attr.draggable]="false"
         [attr.data-sortIndex]="column.field | sortingIndex:grid.sortingExpressions"
         class="sort-icon"
@@ -18,6 +18,6 @@
 
     <igx-icon [ngClass]="filterIconClassName" [attr.draggable]="false" (click)="onFilteringIconClick($event)"
         *ngIf="grid.allowFiltering == true && column.filterable && grid.filterMode == 'excelStyleFilter'">
-        filter_list
+        more_vert
     </igx-icon>
 </div>