Merge branch '8.2.x' into SKrastev/fix-6180-8.2.x

Author: ChronosSF

projects/igniteui-angular/src/lib/services/overlay/overlay.spec.ts

@@ -817,19 +817,15 @@ describe('igxOverlay', () => {
             spyOn(scrollStrat, 'attach').and.callThrough();
             spyOn(scrollStrat, 'detach').and.callThrough();
             const scrollSpy = spyOn<any>(scrollStrat, 'onScroll').and.callThrough();
-            const wheelSpy = spyOn<any>(scrollStrat, 'onWheel').and.callThrough();
             overlay.show(SimpleDynamicComponent, overlaySettings);
             tick();
 
             expect(scrollStrat.attach).toHaveBeenCalledTimes(1);
             expect(scrollStrat.initialize).toHaveBeenCalledTimes(1);
             expect(scrollStrat.detach).toHaveBeenCalledTimes(0);
             document.dispatchEvent(new Event('scroll'));
-
             expect(scrollSpy).toHaveBeenCalledTimes(1);
 
-            document.dispatchEvent(new Event('wheel'));
-            expect(wheelSpy).toHaveBeenCalledTimes(1);
             overlay.hide('0');
             tick();
             expect(scrollStrat.detach).toHaveBeenCalledTimes(1);

projects/igniteui-angular/src/lib/services/overlay/scroll/block-scroll-strategy.ts

@@ -28,13 +28,11 @@ export class BlockScrollStrategy extends ScrollStrategy {
     /** @inheritdoc */
     public attach(): void {
         this._document.addEventListener('scroll', this.onScroll, true);
-        this._document.addEventListener('wheel', this.onWheel, true);
     }
 
     /** @inheritdoc */
     public detach(): void {
         this._document.removeEventListener('scroll', this.onScroll, true);
-        this._document.removeEventListener('wheel', this.onWheel, true);
         this._sourceElement = null;
         this._initialScrollTop = 0;
         this._initialScrollLeft = 0;
@@ -52,9 +50,4 @@ export class BlockScrollStrategy extends ScrollStrategy {
         this._sourceElement.scrollTop = this._initialScrollTop;
         this._sourceElement.scrollLeft = this._initialScrollLeft;
     }
-
-    private onWheel(ev: WheelEvent) {
-        ev.stopImmediatePropagation();
-        ev.preventDefault();
-    }
 }