Emit signal when database table relations queried.
Emit signal when database language chunk queried.
Fix non executing queries.
Fix storing multiple equal keys.
Remove debug outputs.
Receive table relations from database worker.
Store table relations in datamanager.
Store objects in datamanager.
Add implementation for sending objects via signals.
Emit pointers to stored objects.
Connect signal and slot for receiving pointers to objects.
Add objects to ui treeview.
Cleanup.
Merge branch 'db-init-select' into develop