Group undo actions when showing/hiding several notes once, fdo#39454

This is a complement for fdo#39454 bugfix.

Change-Id: I3f406ae151b92419a86abb8f050c8b032d080838
Reviewed-on: https://gerrit.libreoffice.org/1452Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Eike Rathke <erack@redhat.com>

sc/source/ui/view/cellsh1.cxx

@@ -2061,6 +2061,9 @@ void ScCellShell::ExecuteEdit( SfxRequest& rReq )
                     ScRangeList aRanges = *aRangesRef;
                     size_t nRangeSize = aRanges.size();
 
+                    String aUndo = ScGlobal::GetRscString( bShowNote ? STR_UNDO_SHOWNOTE : STR_UNDO_HIDENOTE );
+                    pData->GetDocShell()->GetUndoManager()->EnterListAction( aUndo, aUndo );
+
                     for ( size_t i = 0; i < nRangeSize; ++i )
                     {
                         const ScRange * pRange = aRanges[i];
@@ -2107,6 +2110,8 @@ void ScCellShell::ExecuteEdit( SfxRequest& rReq )
                         }
                     }
 
+                    pData->GetDocShell()->GetUndoManager()->LeaveListAction();
+
                     if ( bDone )
                     {
                         rReq.Done();