Modeler: Ordering in db import config

This is a part of CAY-2634

• Ordering of includes / excludes - when I add an include to a catalog, it is added at the end of the list of includes / excludes. But when I come back to view again, it is reordered to precede all excludes (which is correct, but I guess it should be visually added where it belongs from the start).
• There's no way to reorder entries within includes and excludes. Manual reordering should be useful especially with regular expressions, where rules may depend on previous rules.