Wayland: positioning of contextual menus broken
GIMP Version: master
Operating System: Wayland/Linux
Issue Description
Only saw this on the contextual of the Layers dock so far, but I am guessing this may happen elsewhere. Our contextual (right-click) menu always appear on bottom right of pointer on Wayland, hence if Layers dock is on the right side, part of the menu is out-of-screen.
Reproduction
Reproduction steps:
- Open an image
- Right click a layer
Expected result: menu should appear right/left/top/bottom depending on our position on display to be always fully visible.
Actual result: part of the menu is hidden out of screen.
