The assumption of the generic multifield dialog was that it's always used on top of other dialogs (as was the case in classic UI). Since touch UI the page properties are not within a dialog anymore. That's why following modifications had to be made:
removed check for mandatory existing parent dialog
modified backdrop handling to fit both cases (component dialog and page properties)
The assumption of the generic multifield dialog was that it's always used on top of other dialogs (as was the case in classic UI). Since touch UI the page properties are not within a dialog anymore. That's why following modifications had to be made: