Hide modifier keys from mouse motion binding menu

editor/input_event_configuration_dialog.cpp

@@ -77,6 +77,10 @@ void InputEventConfigurationDialog::_set_event(const Ref<InputEvent> &p_event, c
 			autoremap_command_or_control_checkbox->set_pressed(mod->is_command_or_control_autoremap());
 		}
 
+		if (mm.is_valid()) {
+			show_mods = false;
+		}
+
 		if (k.is_valid()) {
 			show_key = true;
 			Key phys_key = k->get_physical_keycode();
@@ -111,7 +115,7 @@ void InputEventConfigurationDialog::_set_event(const Ref<InputEvent> &p_event, c
 		device_container->set_visible(show_device);
 		key_mode->set_visible(show_key);
 		location_container->set_visible(show_location);
-		additional_options_container->show();
+		additional_options_container->set_visible(show_mods or show_device or show_key or show_location);
 
 		// Update mode selector based on original key event.
 		Ref<InputEventKey> ko = p_original_event;