Add "Select all wares" and "Invert selection" buttons to the warehouse window.
Requested on the forum:
https://wl.widelands.org/forum/topic/1800/
Migrated to https://github.com/widelands/widelands/issues/2030
Bug watches keep track of this bug in other bug trackers.
Migrated to https:/ /github. com/widelands/ widelands/ issues/ 2030