Popup window not recognized as popup on X11

[iacore]

Godot version

4.0 beta10

System information

Linux

Issue description

This is a problem of the Godot editor.

_NET_WM_WINDOW_TYPE of all windows is _NET_WM_WINDOW_TYPE_NORMAL. When using a tiling window manager, the WM tries to tile every popup as well.

It should be _NET_WM_WINDOW_TYPE_DIALOG.

Steps to reproduce

• Open any Godot popup, like "Save or Discard"
• use xprop and click on the popup
• check _NET_WM_WINDOW_TYPE(ATOM) in xprop's output

Minimal reproduction project

N/A

[rsubtil]

Duplicate of #55415?

[iacore]

is duplicate