Updated Slovenian translation
Updated slovak translation
Updated Russian translation
a11y: Remove default description from GtkSwitch

https://bugzilla.gnome.org/show_bug.cgi?id=707926
Updated Latvian translation
Updated Hungarian translation
Updated Belarusian translation.
Updated Lithuanian translation
a11y: set ATK_ROLE_LIST_ITEM to GtkListBoxRow

https://bugzilla.gnome.org/show_bug.cgi?id=707915
a11y: Set proper role for GtkHeaderBar

https://bugzilla.gnome.org/show_bug.cgi?id=707981