Scroll to the top when changing screens

Marlin/ultralcd.cpp

     if (currentScreen != screen) {
       currentScreen = screen;
       lcdDrawUpdate = LCDVIEW_CLEAR_CALL_REDRAW;
+      encoderTopLine = 0;
       #if ENABLED(NEWPANEL)
         encoderPosition = encoder;
         if (feedback) lcd_quick_feedback();