Enable "Move axis" and "Disable steppers" only when idle

Move axis queues movements, which disrupts a normal print, homing (when
XY is combined) or MBL.

Likewise, "Disable steppers" only makes sense when the printer is fully
idle.

Only allow such actions when the printer is not active and/or in the
paused state.

Firmware/ultralcd.cpp

@@ -5747,10 +5747,12 @@ static void lcd_settings_menu()
 	MENU_ITEM_BACK_P(_T(MSG_MAIN));
 
 	MENU_ITEM_SUBMENU_P(_i("Temperature"), lcd_control_temperature_menu);////MSG_TEMPERATURE
-	if (!homing_flag)
+
+	if (!PRINTER_ACTIVE || isPrintPaused)
+    {
 	    MENU_ITEM_SUBMENU_P(_i("Move axis"), lcd_move_menu_1mm);////MSG_MOVE_AXIS
-	if (!isPrintPaused)
 	    MENU_ITEM_GCODE_P(_i("Disable steppers"), PSTR("M84"));////MSG_DISABLE_STEPPERS
+    }
 
 	SETTINGS_FILAMENT_SENSOR;