Draft: I made a new animation and now I am using it everywhere
Dolphin does not have any way to highlight a file other than selecting it or moving keyboard focus there, but selection and keyboard focus should not be used just for highlighting. This commit adds a new animation for file items which bumps the size of their icon either by smoothly growing or shrinking it for a moment.
This commit uses this new animation in various situations, some or all of them might be ill-advised:
(The animations in the video are at times more laggy than they should be because my computer was under heavy load.)
This merge request serves as a place to discuss if such animations should be used in Dolphin, and if the answer is "yes", then where and when. Aside from the colours in System Settings' Colors KCM we don't have a lot of scaling animations, so this might be new terrain to some extent. @teams/vdg
One motivation for me to implement this is that in 122fee56 I changed it so clicking items does not select them anymore and @broulik did not like that through this there was now less feedback when an item is clicked.