Manually create widgets
  * MorpheusMainWidget
  * DataAssetCatalogWidget
  * AssetQuerySessionsWidget
  * AssetQuerySessionsWidget
and successfully lay them out using horizontal and vertical splitter.

No Qt Designer or other GUI generation tools were used. The
DataAssetCatalogWidget derives from QTreeView. The
AssetQuerySessionsWidget derives from KTabView and
AssetQuerySessionWidget derives from QTableView. MorpheusMainWidget
derives from QWidget.