chore(*): fix PR comments

Author: onlyexeption

projects/igniteui-angular/src/lib/grids/filtering/base/grid-filtering-cell.component.ts

@@ -60,11 +60,9 @@ export class IgxGridFilteringCellComponent implements AfterViewInit, OnInit, DoC
 
     @HostBinding('class')
     get styleClasses(): string {
-        let classes: string;
-
-        this.column && this.column.selected ?
-            classes = 'igx-grid__filtering-cell--selected' :
-            classes = 'igx-grid__filtering-cell';
+        let classes = this.column && this.column.selected ?
+            'igx-grid__filtering-cell--selected' :
+            'igx-grid__filtering-cell';
 
         switch (this.column.grid.displayDensity) {
             case DisplayDensity.compact:

projects/igniteui-angular/src/lib/grids/filtering/base/grid-filtering-row.component.html

@@ -109,7 +109,7 @@
                         <igx-icon>expand_more</igx-icon>
                         <span>{{filteringService.getOperatorAsString(item.afterOperator)}}</span>
                     </button>
-                    <igx-drop-down [displayDensity]="displayDensity" #operators (onSelection)="onLogicOperatorChanged($event, item)">
+                    <igx-drop-down [displayDensity]="column.grid.displayDensity" #operators (onSelection)="onLogicOperatorChanged($event, item)">
                             <igx-drop-down-item [value]="0" [selected]="item.afterOperator === 0">{{filteringService.grid.resourceStrings.igx_grid_filter_operator_and}}</igx-drop-down-item>
                             <igx-drop-down-item [value]="1" [selected]="item.afterOperator === 1">{{filteringService.grid.resourceStrings.igx_grid_filter_operator_or}}</igx-drop-down-item>
                     </igx-drop-down>