fix(grid): add background-clip to filtering cell style - master#16794

IMinchev64 wants to merge 1 commit intomasterIgniteUI/igniteui-angular:masterfrom

iminchev/pinned-filtering-cell-border-21.1.xIgniteUI/igniteui-angular:iminchev/pinned-filtering-cell-border-21.1.xCopy head branch name to clipboard