Improve dox of `NodesOnlyMesh::ReMesh` and remove useless condition in the method (every cell now has a radius). This is prepping ground for #2261

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@17945 b5f69653-2bf5-0310-8201-b0dafb8e1405
#1360 Fix production build for pickier compiler options

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@17947 b5f69653-2bf5-0310-8201-b0dafb8e1405
Nobody likes tabs.

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@17948 b5f69653-2bf5-0310-8201-b0dafb8e1405
#2330 moved `mMechanicsCutOffLength` from `NodeBasedCellPopulation` to `NodesOnlyMesh` and updated relevant tests

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@17950 b5f69653-2bf5-0310-8201-b0dafb8e1405