* Fixed an invalid g_object_ref without g_object_unref

	* Fixed an invalid g_object_ref without g_object_unref
	* Some code clean ups
	* Removed some unused debug code
	* Fixed an issue with drag&drop, the unselect of the source folder is now done properly
	* Exported a private function to the modest-tny-folder API
	* Changed the name and the signature of the callback of xfer mail operations
	* Refactored the xfer_folder method
	* Fixes NB#66340, d&d an user created folder to a subfolder is no longer possible
	* Fixes NB#67817, focus is not lost anymore when transfer operations fails
	* The "Pasting" info note is removed when the transfer operation fails

pmo-trunk-r3328