Sidebar panes: Alternate highlight when not in focus
Currently, thumbnails, and outline/annotations/bookmark entries are highlighted in blue, whether or not these elements have the focus (for keyboard navigation).
I think the highlight is a visual cue to indicate which element is focused. If this is true, it may be better to change the highlight color when elements are not in focus. Note that it is incompatible with the mouse which does not grab the focus (see comments in !421).
For example, Files uses another highlight to indicate that the sidebar is not focused. Highlight difference between "Dossier personnel" which is not focused, and "Bureau" which is focused: :
Edited by Michaël Berteaux