Fixed Move Collection action

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>
Utils: introduce a CheckButtonStyle, to put stress on a checked state button

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>
Utils: remove useless FilteredListModel, and introduce a SortedListModel

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>