Multiple monitor arrangement breaks menus
I have a multi-monitor setup (4 from an NVIDIA card),
I have them arranged 3 in a row and 1 above. The end 2 of each row are portrait orientation and the leftmost one holds the menubar.
e.g. [landscape] [portrait & menubar][landscape][portrait]
Many applications (Celemntine, QGIS, anything with an old style menubar) display menus in the wrong place.
Menus appear at the height of the menubar on the leftmost portrait monitor as it is defined as the the monitor for the menubar. The menus appear on the correct monitor, just at the wrong height.
Expected behaviour is obviously for the menus to appear "attached" to the menus.