Button layout problems when zooming in and using rotated screen

[graue70]

The UI isn't great when using a rotated screen (width 1200px x height 1920 pixels) and zooming in to 130% or 140%.

1. The buttons row below the editor looks weird.
2. There is a lot of space for the elements on top of the editor, but their text is hidden anyway. I cannot see which backend I am currently using.