icons
more icons
better image handling for tabs
Merge branch 'unipiraten' into austria

Conflicts:
	app/main/_filter_view/30_navigation.lua
	app/main/index/_index_member.lua
	config/myconfig.lua
translations update
merged language changes
usability improvements

Conflicts:
	app/main/index/_action/confirm_rights.lua
	app/main/issue/_show.lua
	app/main/member/_action/update_rights.lua
	app/main/member/rights.lua