Don't use else after return (#1819)

Applications/DataExplorer/Base/ImportFileTypes.h

Applications/DataExplorer/Base/TreeItem.cpp

Applications/DataExplorer/Base/TreeModel.cpp

...cations/DataExplorer/DataView/DiagramView/DiagramList.cpp

Applications/DataExplorer/DataView/MeshLayerEditDialog.cpp

Applications/DataExplorer/DataView/MshModel.cpp

Applications/DataExplorer/DataView/NetCdfConfigureDialog.cpp

Applications/DataExplorer/DataView/SHPImportDialog.cpp

Applications/DataExplorer/DataView/StationTreeModel.cpp

Applications/DataExplorer/VtkVis/MeshFromRasterDialog.cpp

Applications/DataExplorer/VtkVis/VtkAlgorithmProperties.cpp

Applications/DataExplorer/VtkVis/VtkFilterFactory.cpp

Applications/DataExplorer/VtkVis/VtkRaster.cpp

Applications/DataExplorer/VtkVis/VtkVisPipelineItem.cpp

Applications/DataExplorer/VtkVis/VtkVisPointSetItem.cpp

Applications/DataExplorer/mainwindow.cpp

Applications/FileIO/AsciiRasterInterface.cpp

Applications/FileIO/CsvInterface.cpp

Applications/FileIO/FEFLOW/FEFLOWMeshInterface.cpp

Applications/FileIO/Gmsh/GMSHPolygonTree.cpp