Conflicts:
data/icons/buttons/Makefile.am
Signed-off-by: Thilo Graf <dbt@novatux.de>
Note for last cherry-picks with icon rename:
It would make more sense to rename consequently all the other icons with prefixes like btn_*.*, header_*.* etc. ... means
prefixes matching to groups: buttons, header etc.
For some groups, this has already been done
but at the moment that is not enough.