### Godot version

4.0

### System information

Windows 11

### Issue description

So on my monitor with 2560x1440 resolution retrieved by the `DisplayServer.get_window_size` method shows 2562x1442, which I think is incorrect. A similar result returned by `get_viewport().size`. But it's become correct if the `Resizable` property is turned on.

![image](https://user-images.githubusercontent.com/3036176/212492776-5c09b12e-d25a-4951-8392-54f5a5e3bece.png)


### Steps to reproduce

Create the project, add a label to observe the resolution text, set the full-screen mode in the project settings, toggle off the `Resizable` property, and run the project.

### Minimal reproduction project

[TestResolution.zip](https://github.com/godotengine/godot/files/10418682/TestResolution.zip)

if (!Main::is_iterating()) {
					Main::iteration();
				}
			} else if (wParam == windows[window_id].focus_timer_id) {
				_process_activate_event(window_id, windows[window_id].saved_wparam, windows[window_id].saved_lparam);
				KillTimer(windows[window_id].hWnd, wParam);
				windows[window_id].focus_timer_id = 0U;
			}
		} break;
		case WM_SYSKEYDOWN:
		case WM_SYSKEYUP:
		case WM_KEYUP:
		case WM_KEYDOWN: {
			if (wParam == VK_SHIFT) {
				shift_mem = (uMsg == WM_KEYDOWN || uMsg == WM_SYSKEYDOWN);
			}
			if (wParam == VK_CONTROL) {
				control_mem = (uMsg == WM_KEYDOWN || uMsg == WM_SYSKEYDOWN);
			}
			if (wParam == VK_MENU) {
				alt_mem = (uMsg == WM_KEYDOWN || uMsg == WM_SYSKEYDOWN);
				if (lParam & (1 << 24)) {
					gr_mem = alt_mem;
				}
			}
			if (mouse_mode == MOUSE_MODE_CAPTURED) {
				
				if (wParam == VK_F4 && alt_mem && (uMsg == WM_KEYDOWN || uMsg == WM_SYSKEYDOWN)) {
					_send_window_event(windows[window_id], WINDOW_EVENT_CLOSE_REQUEST);
				}