### Godot version

Godot 4 Beta 16

### System information

Ubuntu 22.04 Running on Vulkan Mesa Intel® UHD Graphics 620 (WHL GT2)

### Issue description


https://user-images.githubusercontent.com/63069499/215583979-e525a1fd-930f-4650-8e9f-3752100cdb72.mp4

Godot keeps clicking out of the color editor

EDIT: I did a test it seems to be single window mode

### Steps to reproduce

Go in editor settings and search for single window mode 

Enable it

Try using the color editor on any color field with single window mode

### Minimal reproduction project

N/A 
XFlush(x11_display);
	
	XEvent ev = {};
	while (XCheckIfEvent(x11_display, &ev, _predicate_all_events, nullptr)) {
		
		if (XFilterEvent(&ev, None)) {
			
			
			continue;
		}
		
		
		
		if (ev.type == SelectionRequest) {
			_handle_selection_request_event(&(ev.xselectionrequest));
			continue;
		}
		r_events.push_back(ev);
	}
}
DisplayServer::WindowID DisplayServerX11::window_get_active_popup() const {