GTKUI: New path chooser to handle remote paths and store favorite paths
GTKUI: Asthetic updates to new path chooser options dialog
GTKUI: Fix layout issues with new path chooser in options tab
GTKUI: Display only folder not full path on path chooser
Fix torrentview exception for self.columns_to_update
Small fixes to path chooser

* Handle completion when removing characteres while the popup is visible
* Set Apply button sensitive when changing move completed path in options tab
daemon code and comment cleanup, removed double call to _shutdown
GTKUI: Simplify the quit code for mainwindow