Use for-range-loop where possible.

Applications/FileIO/GMSInterface.cpp

...tions/Utils/MeshEdit/ResetPropertiesInPolygonalRegion.cpp

Applications/Utils/MeshEdit/checkMesh.cpp

Applications/Utils/MeshEdit/moveMeshNodes.cpp

FileIO/TetGenInterface.cpp

GeoLib/AnalyticalGeometry.cpp

GeoLib/GEOObjects.cpp

GeoLib/IO/Legacy/OGSIOVer4.cpp

GeoLib/Polygon.cpp

GeoLib/Surface.cpp

MeshLib/MeshEditing/Mesh2MeshPropertyInterpolation.cpp

MeshLib/MeshGenerators/MeshGenerator.cpp

MeshLib/MeshQuality/MeshValidation.cpp

Tests/BaseLib/TestQuicksort.cpp

Tests/FileIO/TestCsvReader.cpp

Tests/GeoLib/TestPolygon.cpp

Tests/GeoLib/TestPolyline.cpp

Tests/GeoLib/TestSimplePolygonTree.cpp

Tests/MeshLib/TestAddLayerToMesh.cpp