Move the 'alive dot' in every displayloop

Result see: https://www.youtube.com/watch?v=tdu7J0i-c4g
Loop is executed several times per display update.

Marlin/dogm_lcd_implementation.h

@@ -318,9 +318,9 @@ static void lcd_implementation_status_screen() {
   lcd_setFont(FONT_STATUSMENU);
 
   #ifdef USE_SMALL_INFOFONT
-    u8g.drawBox(0,30,128,10);
+    u8g.drawBox(0,30,127,10);
   #else
-    u8g.drawBox(0,30,128,9);
+    u8g.drawBox(0,30,127,9);
   #endif
   u8g.setColorIndex(0); // white on black
   u8g.setPrintPos(2,XYZ_BASELINE);

Marlin/ultralcd.cpp

@@ -1299,6 +1299,8 @@ void lcd_update() {
     }
   #endif//CARDINSERTED
 
+  static uint8_t dotcounter = 63;
+  
   uint32_t ms = millis();
   if (ms > lcd_next_update_millis) {
 
@@ -1362,11 +1364,12 @@ void lcd_update() {
       blink++;     // Variable for fan animation and alive dot
       u8g.firstPage();
       do {
+        if (!dotcounter) dotcounter = 63;
         lcd_setFont(FONT_MENU);
         u8g.setPrintPos(125, 0);
-        if (blink % 2) u8g.setColorIndex(1); else u8g.setColorIndex(0); // Set color for the alive dot
+//        if (blink % 2) u8g.setColorIndex(1); else u8g.setColorIndex(0); // Set color for the alive dot
-        u8g.drawPixel(127, 63); // draw alive dot
+        u8g.drawPixel(127, dotcounter--); // draw alive dot
-        u8g.setColorIndex(1); // black on white
+//        u8g.setColorIndex(1); // black on white
         (*currentMenu)();
         if (!lcdDrawUpdate) break; // Terminate display update, when nothing new to draw. This must be done before the last dogm.next()
       } while( u8g.nextPage() );