Some properties (flag datatype) are not stored in ui-file if written by QtDesigner

[M. Gronle]

Properties, whose datatype is a self-defined flag (QFlag, combination of an enumeration) are not stored in the ui-file if saved by QtDesigner. However, if it is manually inserted in the ui-file, these values are loaded if the ui-file is opened within itom. Example: geometryModificationModes

[M. Gronle]

This seems to be fixed at least with itom 3.2.1, Qt 5.9.6