Add undo for fit method
Update region selection
Update comment
Add undo for fit method
Use mesh group for linear to cubic mesh conversion
Use mesh group for cubic lagrange fitting
Change signal name
Make find_mesh_dimension public
Use kwargs.get
Remove self
Fix default value for start_node_id
Update docstring
Update objective functions
Add fit_project module
Add edge discontinuity visualisation
Add project, various tidy ups
Change fit parameter names
Add import menus
Update tests