Marble: Fix regression of the Bookmark name suggestion
completed by: Mikhail Ivchenko
mentors: Dennis Nienhüser, Torsten Rahn, Sanjiban Bairagya, shentey
When adding a Bookmark via "Add Bookmark" the suggested name initially displays the correct coordinates and then gets replaced by the wrong "0.00000 0.00000" coordinates.
Please fix this issue and re-enable the original correct behavior.