Flags declared with Q_FLAGS lack the methods for properly extracting the
typedef'd name. We need to manually register the typedef.
Amends commit 8bf5aae19b.
Pick-to: 6.10 6.9 6.8
Fixes: QTBUG-138174
Change-Id: I7c373f4d810a0c9a5590f39cc629015662a69ed4
Reviewed-by: Sami Shalayel <sami.shalayel@qt.io>
Ulf Hermann