Sketcher: Bug fix: Constraints dissapear after a sketch loses support
Sketcher: Bug fix: Constraints dissapear after a sketch loses support

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Issue:
http://freecadweb.org/tracker/view.php?id=2292

Constraints dissapear after a sketch loses support

Steps To Reproduce:
1. Make a sketch on a face.
2. Constrain it
3. Select "reorient sketch"
4. Do you want to lose support? Yes
5. Click cancel on the reorientation dialog.
6. Enter edit mode: No constraints...

Why?
GeoUndef not checked when deleting all external geometry (on dettaching from the support).

Solution:
Check for GeoUndef.

mickele77/FreeCAD,timthelion/FreeCAD,kkoksvik/FreeCAD,chrisjaquet/FreeCAD,bblacey/FreeCAD-MacOS-CI,usakhelo/FreeCAD,usakhelo/FreeCAD,chrisjaquet/FreeCAD,bblacey/FreeCAD-MacOS-CI,timthelion/FreeCAD,usakhelo/FreeCAD,bblacey/FreeCAD-MacOS-CI,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,wood-galaxy/FreeCAD,Fat-Zer/FreeCAD_sf_master,maurerpe/FreeCAD,bblacey/FreeCAD-MacOS-CI,Fat-Zer/FreeCAD_sf_master,bblacey/FreeCAD-MacOS-CI,maurerpe/FreeCAD,timthelion/FreeCAD,chrisjaquet/FreeCAD,chrisjaquet/FreeCAD,mickele77/FreeCAD,maurerpe/FreeCAD,mickele77/FreeCAD,Fat-Zer/FreeCAD_sf_master,usakhelo/FreeCAD,wood-galaxy/FreeCAD,wood-galaxy/FreeCAD,usakhelo/FreeCAD,kkoksvik/FreeCAD,timthelion/FreeCAD,kkoksvik/FreeCAD,mickele77/FreeCAD,chrisjaquet/FreeCAD,wood-galaxy/FreeCAD,usakhelo/FreeCAD,chrisjaquet/FreeCAD,kkoksvik/FreeCAD,chrisjaquet/FreeCAD,wood-galaxy/FreeCAD,bblacey/FreeCAD-MacOS-CI,maurerpe/FreeCAD,mickele77/FreeCAD,usakhelo/FreeCAD,timthelion/FreeCAD,kkoksvik/FreeCAD,bblacey/FreeCAD-MacOS-CI,timthelion/FreeCAD,maurerpe/FreeCAD,wood-galaxy/FreeCAD