### Godot version

4 rc6

### System information

Windows 11, Vulkan, ryzen 9 5900X, rx 6700xt

### Issue description

If you export an array and then add a resource to the array, the scrollbar for the create resource drop down doesn't work.

A workaround would be to scroll with the mouse wheel, but it's still an issue and the list can get quite long, which can make mouse wheel scrolling tedious. 

### Steps to reproduce

1. Export an array (for example `@export var test: Array = []`)
2. Create a new element
3. Right click in the `<empty>` field
4. Try to use the scroll bar (it won't work)

### Minimal reproduction project

See "Steps to reproduce"
results->GetItemAt(i, &result);
						PWSTR file_path = nullptr;
						hr = result->GetDisplayName(SIGDN_FILESYSPATH, &file_path);
						if (SUCCEEDED(hr)) {
							file_names.push_back(String::utf16((const char16_t *)file_path));
							CoTaskMemFree(file_path);
						}
						result->Release();
					}
					results->Release();
				}
			} else {
				IShellItem *result;
				hr = pfd->GetResult(&result);
				if (SUCCEEDED(hr)) {
					PWSTR file_path = nullptr;
					hr = result->GetDisplayName(SIGDN_FILESYSPATH, &file_path);
					if (SUCCEEDED(hr)) {
						file_names.push_back(String::utf16((const char16_t *)file_path));
						CoTaskMemFree(file_path);
					}
					result->Release();
				}
			}
			if (!p_callback.is_null()) {
				Variant v_result = true;
				Variant v_files = file_names;
				Variant v_index = index;
				Variant ret;
				Callable::CallError ce;