Restore column order from state.

On the TorrentView's treeview, the column's position stored on state was being ignored, but event if that info was not being ignored and passed to the several `add_column`'s the order could not be added because the order the columns are added does not(might not) match what was stored in state. So, we now restore the ordering once all columns are added.

Conflicts:
	deluge/ui/gtkui/torrentview.py