I am checking out 2.266 and find the banks and more menu drops down fine ... in Play, but NOT in Design mode. Still am unable to change number of banks in Design mode. Changing number of banks is often necessary when designing layouts.
Still suggest NOT supporting the Split View mode. Why does MDP need it? The current solution seems more like a work around than a desirable operation. It doesn't seem to work reliably 100% of the time. Other apps do not support it. They do not get the 3 dots at top and do not have any operational issues.
Also, the drop down menu may not stay down long enough to activate changing the number of banks in Design Mode. I am not able to test this behavior in 2.266.
The images show the layout I used where more and banks drops down in Play Mode, but not in Design Mode.
Test layout in Design Mode
Test layout in Play Mode