### Godot version

Master (0ddd9c3e8f9088fa139e25b2903289d727073e12)

### System information

PopOS 22.04 - Intel integrated graphics - all backends

### Issue description

When there are popup windows in the editor, I cannot click on the "Confirm"/"Cancel" type buttons at the button. 

I have the issue both in the project manager (importing projects I can click on files etc. but cannot click "open") and when running the editor (cannot click "Save&Quit" etc.)

Sometimes the editor correctly highlights the buttons and I can use the arrow keys to navigate the buttons and "enter" to confirm my selection.

_I can navigate the editor closing dialogue with tab/arrow keys_
![Screenshot from 2023-01-16 14-24-06](https://user-images.githubusercontent.com/16521339/212774269-d784ea5e-5921-4460-9124-48978939c8e7.png)

_I can't navigate the project import dialogue with tab/arrow keys_
![Screenshot from 2023-01-16 14-29-00](https://user-images.githubusercontent.com/16521339/212774683-0a80795a-eed4-4e65-b2ca-3562c25d71fd.png)


### Steps to reproduce

Run the editor

### Minimal reproduction project

Reproducible in the project manager
DisplayServerX11 *display_server = static_cast<DisplayServerX11 *>(ud);
	display_server->_poll_events();
}
Bool DisplayServerX11::_predicate_all_events(Display *display, XEvent *event, XPointer arg) {
	
	return True;
}
bool DisplayServerX11::_wait_for_events() const {
	int x11_fd = ConnectionNumber(x11_display);
	fd_set in_fds;
	XFlush(x11_display);
	FD_ZERO(&in_fds);
	FD_SET(x11_fd, &in_fds);
	struct timeval tv;
	tv.tv_usec = 0;
	tv.tv_sec = 1;
	
	int num_ready_fds = select(x11_fd + 1, &in_fds, nullptr, nullptr, &tv);
	if (num_ready_fds > 0) {
		
		return true;
	} else {
		
		if (num_ready_fds < 0) {
			ERR_PRINT("_wait_for_events: select error: " + itos(errno));
		}
		return false;
	}
}
void DisplayServerX11::_poll_events() {