Marinus Schraal authored Mar 17, 2018 and Marinus Schraal committed Mar 17, 2018

The ui files had the 'gnome-music' gettext domain name hard coded, while
after the move to Meson we use 'org.gnome.Music' instead.

Remove the domain, so the correct gettext domain gets picked up from the
environment.

Closes: #169


(cherry picked from commit bb4b837b)