qml: Update components design and focus box
The following MR updates the following components according to the most recent design discussions:
- GridItem
- TableViewDelegate
- BannerTabButotn
- IconToolButton
- DiscoverUrlDisplay
- TabButtonExt
- TextToolButon
- SortControl
It also adds BackgroundFocus that implements the proper focus rectangle for everyone and FocusBackground becomes BackgroundHover now that the focus component is separate from the background.
Edited by Benjamin Arnaud