### Godot version

v4.1.beta3.mono.official [ada712e06]

### System information

Godot v4.1.beta3.mono - Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1660 Ti with Max-Q Design (NVIDIA; 31.0.15.3179) - Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz (12 Threads)

### Issue description

Vertical scrollbar can't be clicked and dragged in exported property dropdown selection. When you hover over a scrollbar it will light up, but can't be clicked and dragged like other scrollbars.

### Steps to reproduce

Export a property that has a lot of options to select like `[Export] Resource resource;`
In the inspector open property selection dropdown then try to click and drag vertical scrollbar.

https://github.com/godotengine/godot/assets/8630984/60d8f85b-c72a-46b9-bcf7-1f28e680111a



### Minimal reproduction project

NA
return 0;
			}
		} break;
		case WM_NCHITTEST: {
			if (windows[window_id].mpass) {
				return HTTRANSPARENT;
			}
		} break;
		case WM_MOUSEACTIVATE: {
			if (windows[window_id].no_focus) {
				return MA_NOACTIVATEANDEAT; 
			} else if (windows[window_id].is_popup) {
				return MA_NOACTIVATE; 
			}
		} break;
		case WM_SETFOCUS: {
			windows[window_id].window_has_focus = true;
			last_focused_window = window_id;
			
			_set_mouse_mode_impl(mouse_mode);
			if (!app_focused) {
				if (OS::get_singleton()->get_main_loop()) {
					OS::get_singleton()->get_main_loop()->notification(MainLoop::NOTIFICATION_APPLICATION_FOCUS_IN);
				}
				app_focused = true;
			}
		} break;
		case WM_KILLFOCUS: {
			windows[window_id].window_has_focus = false;
			last_focused_window = window_id;