### 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
XFlush(x11_display);
				} else if ((unsigned int)event.xclient.message_type == (unsigned int)xdnd_drop) {
					if (requested != None) {
						xdnd_source_window = event.xclient.data.l[0];
						if (xdnd_version >= 1) {
							XConvertSelection(x11_display, xdnd_selection, requested, XInternAtom(x11_display, "PRIMARY", 0), windows[window_id].x11_window, event.xclient.data.l[2]);
						} else {
							XConvertSelection(x11_display, xdnd_selection, requested, XInternAtom(x11_display, "PRIMARY", 0), windows[window_id].x11_window, CurrentTime);
						}
					} else {
						
						XClientMessageEvent m;
						memset(&m, 0, sizeof(m));
						m.type = ClientMessage;
						m.display = event.xclient.display;
						m.window = event.xclient.data.l[0];
						m.message_type = xdnd_finished;
						m.format = 32;
						m.data.l[0] = windows[window_id].x11_window;
						m.data.l[1] = 0;
						m.data.l[2] = None; 
						XSendEvent(x11_display, event.xclient.data.l[0], False, NoEventMask, (XEvent *)&m);
					}
				}
				break;
			default:
				break;
		}
	}
	XFlush(x11_display);