TODO


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setcap nice for good performance when opening overlay when game is running below 60 fps.
Maybe grab cursor with xi, as that will prevent games from detecting movement with xi2 api.

Fullscreen on wayland doesn't render windows behind because it's a compositor optimization, to not draw anything behind (only draw the window directly without compositing).
Fix this by drawing the window smaller, or have two windows (left and right half monitor width).
Maybe change design to have black triangles appear and get larger until they fill the screen, with even spaces being left with no triangles.
    Exclude triangles from a diagonal line across the screen.
    Have buttons appear slanted in 3D.
    All of these things should be done with vertex buffer, for real 3D.

WAYLAND_DISPLAY gamescope-0, DISPLAY=:1 (gamescope xwayland)

Optimize list/page when having a few items in it (dont use vector<unique_ptr<Widget>>).

Only redraw ui if changed (dirty state, propagate upward. Set dirty when adding widget or changing any visible properly on a widget or when event updates how the widget should be displayed).

Use _NET_WM_ALLOWED_ACTIONS. Same for notifications.

Handle events in draw function because the render position of elements is available there so why duplicate it in event handler.