* Exclude "default" category from reordering
Due to the "default" category having been added to the database, the index based approach to reorder the categories didn't work anymore.
In case one tried to move a category to or from pos 1, the default category was selected due to being at index 0
* Normalize categories after reordering
Makes sure that the ordering is correct.
E.g. "default" category should always be at position 0
schroda
1a9a0b3394