gnome-control-center 2.7.1

Translations:
 * Bosnian translation added.

Frederic Crozat:
 * Use themed icon for windows

Rodney Dawes:
 * Add "W x H pixels" to description, and remove file size for bg capplet

Sergey:
 * Fixes to keybinding capplet

Kjartan Maraas:
 * text cleanup

Jeroen Zwartepoorte:
 * Use the parent type in the G_DEFINE_TYPE

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