+ Pre-open MED file to speed-up reading/writing (following 22349)
+ Clock-cursor in Display Entity dlg
+ In Filter dlg, do not perform filtering if it's not needed
+ In Group dlg, store a user-given name of a new group
+ Clock-cursor after hypothesis modif as mesh clearing can be long
+ Treat selected object right at opening of Measure dlgs
+ Allow removal of elements in a not shown mesh
+ Make filter work on a not shown mesh
+ Don't leave orphan nodes at RemoveGroupWithContents
+ Avoid crash when exporting a group + fields
Now UnRegister(), corresponding to the Register() called by AttributeIOR,
is invoked by an object publisher i.e. by SMESH_Gen_i::publish() but not by GUI
because GUI is unable to track publication of all objects created by the Engine:
for example groups can be created while mesh.Compute() is called.
