Now all classes and members are either exposed to bindings or marked
as "not available in Python bindings" in the docs.
Drop test thresholds to 0. Now it should be much easier to determine
what missing members have been added which are causing test
failures.
I have managed to break that with implementation of #11369.
Obviously it is a bad idea to change selection in a slot connected to model's rowsInserted signals
because the drag'n'drop does not work properly anymore. Now registry bridge will emit a signal after
new layers have been added, so the selection change at that point should be safe.
