For many languages, there are unavoidable long words needed for the labels
on the button bar, for example, the standard word for Settings can be up to
15 characters long:
https://gitlab.com/fdroid/fdroidclient/issues/1569#note_126469088
The BottomBar was scaling the active one up, and sizing all the fields based
on that size. This removes that animation, and sets all tabs to always have
the same text size. That makes it possible to make the spacing tighter.
This also sets the text truncating mode to "middle" which sticks an elipsis
in the middle of the truncated word and shows the start and end.
closes#1569closes!756
ae0c712a3e