Store GUI in Glade files
Fix AlbumWidget
Revert styling of artist view for debugging purposes
Rewrite AlbumsWidget
Updated artist view per design
Padding for titles on artist view
Fix sorting of titles of songs in albumsongs view
More small adjustments
Ported UI to glade
Vertical padding for released label

Author: Guillaume Quintard
Updated POTFILES.in
Updated Polish translation
Fix duplicated songs
Fix duplications