[DL]String additions to 'gtk.master'

[GNOME Status Pages <noreply gnome org>]

This is an automatic notification from status generation scripts on:
https://l10n.gnome.org.

There have been following string additions to module 'gtk.master':

+ "GtkSettings source"::"Application"
    + "GtkSettings source"::"Default"
    + "GtkSettings source"::"Theme"
    + "GtkSettings source"::"Unknown"
    + "GtkSettings source"::"XSettings"
    + "Use a dark background"
    + "column number"::"None"

Note that this doesn't directly indicate a string freeze break, but it
might be worth investigating.
https://gitlab.gnome.org/GNOME/gtk/commits/master