groups function producing errors and failing component registry/lux16

[alekoe]

1)Whenever groups are accessed in the component browser error messages occur. Functions from there can be accessed. Yet whenever changes in profiles are to be saved, the program produces new errors and fails to implement the changes.
2)Moving profiles/components from other workspaces/groups into groups fails: an error message occurs and the moved profile is to be found neither in the original workspace nor in the destination groups workspace.
3)Dragging components from group spaces into profiles/components in the editor works, but error messages appear.
4) Switching between profiles and components in groups fails, error messages appear.

[Twan Goosen]

All works fine now (r5781). Almost ready for testing.