Merge branch '8.1.x' of https://github.com/IgniteUI/igniteui-angular into nrobakova/fix-issue-5949-81

Author: 3phase

projects/igniteui-angular/src/lib/core/styles/components/grid-toolbar/_grid-toolbar-theme.scss

@@ -168,38 +168,11 @@
         height: map-get($grid-toolbar-height, 'comfortable');
 
         %igx-button--flat {
-            background: --var($theme, 'button-background');
-            color: --var($theme, 'button-text-color');
             margin-left: rem(8);
-
-            &:hover {
-                background: --var($theme, 'button-hover-background');
-                color: --var($theme, 'button-hover-text-color');
-            }
-
-            &:focus,
-            &:active {
-                background: --var($theme, 'button-focus-background');
-                color: --var($theme, 'button-focus-text-color');
-            }
         }
 
         %igx-button--icon {
-            background: --var($theme, 'button-background');
-            color: --var($theme, 'button-text-color');
             margin-left: rem(8);
-            border-radius: 0;
-
-            &:hover {
-                background: --var($theme, 'button-hover-background');
-                color: --var($theme, 'button-hover-text-color');
-            }
-
-            &:focus,
-            &:active {
-                background: --var($theme, 'button-focus-background');
-                color: --var($theme, 'button-focus-text-color');
-            }
         }
 
         %igx-grid-toolbar__button-space {

projects/igniteui-angular/src/lib/grids/grid-navigation.service.ts

@@ -21,7 +21,7 @@ export class IgxGridNavigationService {
     }
 
     get displayContainerScrollLeft() {
-        return Math.round(this.grid.parentVirtDir.getHorizontalScroll().scrollLeft);
+        return Math.ceil(this.grid.parentVirtDir.getHorizontalScroll().scrollLeft);
     }
 
     get verticalDisplayContainerElement() {