Sketcher: DoF finder command while using the default SparseQR
Sketcher: DoF finder command while using the default SparseQR

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- Modification to transparently switch from SparseQR to DenseQR and back to SparseQR when using the DoF finder command.
- Command Tools dof finder command name change

Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master