+ Added: Option to show index numbers in history.
+ Fixed: Search window now gets properly focused when launched with the hotkey.
+ Fixed: Search window is now resizable.
+ Fixed: Double casting when calling 'item_selected'.
+ Fixed: Removed some unnecessary comments and fixed some of the others.
+ Fixed: Moved search dialog and functions to manage.c, as this dialog will
become "Manage Clipboard" in the next version.
