- Revised base classes for IUndoableAction
- Reordered lots of code, so stuck actions should be less frequent
- Added wildcard support to many "remove" methods
- Started working on exist & duplicate checks
- Fixed various crashes if no recipes are removed and the undo method is
called (e.g. on /mt reload), adding a null object.
- Added option to remove more than 1 recipe with BaseListRemoval
- Cleanup of some classes which are extending BaseListRemoval