### Godot version

v4.0.beta15.mono.official [4fa6edc88]

### System information

Linux, Xorg

### Issue description

The entire window loses focus if you ungrab focus from a Control. 
This doesn't seem to happen in Beta 14 and older betas.

### Steps to reproduce

1. Create a Control that can grab focus (tested with LineEdit and TextEdit)
2. Grab focus
3. Release focus via release_focus() or hiding the node

### Minimal reproduction project

[FocusMinimal.zip](https://github.com/godotengine/godot/files/10498175/FocusMinimal.zip)

} else {
						count++;
					}
				}
			}
			if (count > 0) {
				ds->im_selection = Point2i(start + call_data->chg_first, count);
			} else {
				ds->im_selection = Point2i(call_data->caret, 0);
			}
		} else {
			ds->im_text = String();
			ds->im_selection = Point2i();
		}
		OS_Unix::get_singleton()->get_main_loop()->notification(MainLoop::NOTIFICATION_OS_IME_UPDATE);
	}
}
void DisplayServerX11::_xim_preedit_caret_callback(::XIM xim, ::XPointer client_data,
		::XIMPreeditCaretCallbackStruct *call_data) {
}
void DisplayServerX11::_xim_destroy_callback(::XIM im, ::XPointer client_data,
		::XPointer call_data) {
	WARN_PRINT("Input method stopped");
	DisplayServerX11 *ds = reinterpret_cast<DisplayServerX11 *>(client_data);
	ds->xim = nullptr;
	for (KeyValue<WindowID, WindowData> &E : ds->windows) {
		E.value.xic = nullptr;
	}
}
void DisplayServerX11::_window_changed(XEvent *event) {