0.48, window size regression in Hyprland #10268

Describe the bug
In a tiled layout, Hyprland will forcibly resize Kitty's OS window, but if initial_window_width and initial_window_height are set, Kitty ignores the window's real size and only draws the initial surface.

Unsetting initial_window_width and initial_window_height fixes it, but it means that the Kitty windows I start as floating will not have the size I expect.

To Reproduce
Steps to reproduce the behavior:

• Use Hyprland (probably any Wayland tiler works as well)
• Make sure that initial_window_width and initial_window_height are set in Kitty's config
• Open a tiled Kitty OS window
• Observe Kitty is not drawing the full surface