Merge pull request #1279 from telerik/didi/ac-keyboard

update autocomplete keyboard

Author: didiyordanova

controls/autocomplete/keyboard-support.md

@@ -19,6 +19,9 @@ The following table lists the actions and keyboard combinations that are availab
 | `Esc`	| Takes effect only when the suggestion view is opened. It closes the suggestion view of the AutoComplete control. |
 | `Up Arrow` / `Down Arrow` | When the suggestion view is opened, pressing `Up/Down Arrows` changes the highlighted item in the suggestion view list. |
 | `PageUp` / `PageDown` | When the suggestion view is opened, pressing `PageUp/PageDown` changes the highlighted item. `PageUp` navigates to the first item in the visible area, `PageDown` navigates to the last item in the visible area. |
+| `Backspace` (WinUI) | When there are tokens in the input area, pressing the `Backspace` key deletes the token. |
+
+The first item in the suggestion view is highlighted by default (set as `CuttentItem`) when the view gets opened.
 
 ## See Also