Remove & then re-add undo items to parent group.

Removing the item from the board will also remove it
from any parent group, which then wasn't getting
restored.  This makes it more clear that we need to
remove and then re-add.

Fixes https://gitlab.com/kicad/code/kicad/-/issues/18017

pcbnew/undo_redo.cpp

@@ -433,6 +433,7 @@ void PCB_BASE_EDIT_FRAME::PutDataInPreviousState( PICKED_ITEMS_LIST* aList )
         {
             BOARD_ITEM*           item = (BOARD_ITEM*) eda_item;
             BOARD_ITEM_CONTAINER* parent = GetBoard();
+            PCB_GROUP*            parentGroup = item->GetParentGroup();
 
             if( item->GetParentFootprint() )
             {
@@ -445,6 +446,10 @@ void PCB_BASE_EDIT_FRAME::PutDataInPreviousState( PICKED_ITEMS_LIST* aList )
             BOARD_ITEM* image = (BOARD_ITEM*) aList->GetPickedItemLink( ii );
 
             view->Remove( item );
+
+            if( parentGroup )
+                parentGroup->RemoveItem( item );
+
             parent->Remove( item );
 
             item->SwapItemData( image );
@@ -463,6 +468,10 @@ void PCB_BASE_EDIT_FRAME::PutDataInPreviousState( PICKED_ITEMS_LIST* aList )
             view->Add( item );
             view->Hide( item, false );
             parent->Add( item );
+
+            if( parentGroup )
+                parentGroup->AddItem( item );
+
             update_item_change_state( item, ITEM_CHANGE_TYPE::CHANGED );
             break;
         }