Don't babystep on long click unless printing

As pointed out in #10731

Marlin/src/lcd/ultralcd.cpp

           if (currentScreen == lcd_status_screen)
             doubleclick_expire_ms = millis() + DOUBLECLICK_MAX_INTERVAL;
         }
-        else if (screen == lcd_status_screen && currentScreen == lcd_main_menu && PENDING(millis(), doubleclick_expire_ms))
+        else if (screen == lcd_status_screen && currentScreen == lcd_main_menu && PENDING(millis(), doubleclick_expire_ms) && (planner.movesplanned() || IS_SD_PRINTING))
           screen =
             #if ENABLED(BABYSTEP_ZPROBE_OFFSET)
               lcd_babystep_zoffset