Sketcher: Bug fixes to Auto-Update Mode

=======================================

- Fixing toggle AutoUpdate Mode
- Fix Auto-Update Sketcher tools
- Fix missing createGeo recomputes
- Missing constraints recomputes fixed

Various fixes for non-Update mode:
- Fixes lack of update upon entering a conflicting datum constraint.
- Fixes lack of update upon setting the reference/driving status of a constraint

- Added tooltips to buttons

src/Mod/Sketcher/App/SketchObject.cpp

@@ -289,6 +289,9 @@ int SketchObject::setDriving(int ConstrId, bool isdriving)
     newVals[ConstrId] = constNew;
     this->Constraints.setValues(newVals);
     delete constNew;
+    
+    if(noRecomputes) // if we do not have a recompute, the sketch must be solved to update the DoF of the solver
+        solve();
 
     return 0;
 }
@@ -342,6 +345,9 @@ int SketchObject::toggleDriving(int ConstrId)
     newVals[ConstrId] = constNew;
     this->Constraints.setValues(newVals);
     delete constNew;
+    
+    if(noRecomputes) // if we do not have a recompute, the sketch must be solved to update the DoF of the solver
+        solve();
 
     return 0;
 }