Menu doesn't fill the screen when using a secondary display in portrait (90 deg rotated)

[PreyK]

When using a secondary display in portrait the menu doesn't fit. But if I disable the primary display to use only one display in portrait and restart the menu it fills the screen's top correctly.

Expected result on the portrait display when using 2 displays: Actual result:

Steps to reproduce:

1. Plug in an external display.
2. rotate it and set it to portrait mode in the Screen Settings (screen layout editor)
3. You should see something like on the screenshots.

[probonopd]

Let's just say that multi-monitor setups are not supported yet. If someone wants to look into this topic, that would be very welcome. The desired behavior is described in https://github.com/helloSystem/Menu/issues/41#issuecomment-778399118.

[probonopd]

Is this still an issue?