Add __EMPTY__ multistate to filter.
Remove excess spaces added by perltidy.
Merge branch 'master' of github.com:wtertius/QBit-Application-Model-DBManager
Merge branch 'master' of github.com:wtertius/QBit-Application-Model-DBManager
Add group_by to models and do not load the all fields without need.
Revert wrong change.
Fix perltidy errors.
Remove group_by.
Merge pull request #4 from wtertius/master

Add group_by to models and do not load the all fields without need.