Added Aragonese translation
Remove 'Load More' button from artists

https://bugzilla.gnome.org/show_bug.cgi?id=724016
searchbar: the class for searchbars has changed.

https://bugzilla.gnome.org/show_bug.cgi?id=724025
Remove border from playback toolbar

https://bugzilla.gnome.org/show_bug.cgi?id=724027
headerbar: Fix item positions

https://bugzilla.gnome.org/show_bug.cgi?id=721741
Fix PyGI deprecation for positional arguments