0020693: EDF 1288 SMESH: Problem to recompute a mesh with a sub-mesh and a conversion...

0020693: EDF 1288 SMESH: Problem to recompute a mesh with a sub-mesh and a conversion linear-quadratic
+    if ( myMesh->HasModificationsToDiscard() && // issue 0020693
+         SUIT_MessageBox::question( desktop(), tr( "SMESH_WARNING" ),
+                                    tr( "FULL_RECOMPUTE_QUESTION" ),
+                                    tr( "SMESH_BUT_YES" ), tr( "SMESH_BUT_NO" ), 1, 0 ) == 0 )
+      myMesh->Clear();