Delete WorkAreaTabWidget
Loading bar doesn't centered #309
Allow multiple deleting of documents by selecting two cells in Table View #311
Size of Tooltip for User can be increased. Now, user ID is cutted of in tooltip.
Delete not needed events, some refactoring
Update MongoWorker
Fix linux build
Stable code
KeapAlive On
Merge pull request #312 from topilski/master

Loading bar doesn't centered #309