Small changes in MainWindow
Retranslating of LogWidget
Retranslating of BsonTreeView
Retranslating of WorkAreaTabBar
Retranslating of PagingWidget
Retranslating of OutputItemHeaderWidget
Retranslating of CollectionStatsTreeWidget
Retranslating of OutputItemContentWidget
Removing redundant field from AppRegistry
Small refactoring of SettingsManager