Modify Z-offset overlay for clarity (#13660)

Marlin/src/lcd/dogm/ultralcd_DOGM.cpp

   #if EITHER(BABYSTEP_ZPROBE_GFX_OVERLAY, MESH_EDIT_GFX_OVERLAY)
 
     const unsigned char cw_bmp[] PROGMEM = {
-      B00000011,B11111000,B00000000,
-      B00001111,B11111110,B00000000,
-      B00011110,B00001111,B00000000,
-      B00111000,B00000111,B00000000,
-      B00111000,B00000011,B10000000,
-      B01110000,B00000011,B10000000,
-      B01110000,B00001111,B11100000,
-      B01110000,B00000111,B11000000,
-      B01110000,B00000011,B10000000,
-      B01110000,B00000001,B00000000,
-      B01110000,B00000000,B00000000,
-      B00111000,B00000000,B00000000,
-      B00111000,B00000111,B00000000,
-      B00011110,B00001111,B00000000,
-      B00001111,B11111110,B00000000,
-      B00000011,B11111000,B00000000
+      B00000001,B11111100,B00000000,
+      B00000111,B11111111,B00000000,
+      B00001111,B00000111,B10000000,
+      B00001110,B00000001,B11000000,
+      B00000000,B00000001,B11000000,
+      B00000000,B00000000,B11100000,
+      B00001000,B00000000,B11100000,
+      B00011100,B00000000,B11100000,
+      B00111110,B00000000,B11100000,
+      B01111111,B00000000,B11100000,
+      B00011100,B00000000,B11100000,
+      B00001110,B00000000,B11100000,
+      B00001110,B00000001,B11000000,
+      B00000111,B10000011,B11000000,
+      B00000011,B11111111,B10000000,
+      B00000000,B11111110,B00000000
     };
 
     const unsigned char ccw_bmp[] PROGMEM = {
 
       // Draw cw/ccw indicator and up/down arrows.
       if (PAGE_CONTAINS(47, 62)) {
-        u8g.drawBitmapP(left  + 0, 47, 3, 16, rot_down);
-        u8g.drawBitmapP(right + 0, 47, 3, 16, rot_up);
-        u8g.drawBitmapP(right + 20, 48 - dir, 2, 13, up_arrow_bmp);
-        u8g.drawBitmapP(left  + 20, 49 - dir, 2, 13, down_arrow_bmp);
+        u8g.drawBitmapP(right + 0, 48 - dir, 2, 13, up_arrow_bmp);
+        u8g.drawBitmapP(left  + 0, 49 - dir, 2, 13, down_arrow_bmp);
+        u8g.drawBitmapP(left  + 13, 47, 3, 16, rot_down);
+        u8g.drawBitmapP(right + 13, 47, 3, 16, rot_up);
       }
     }