Add option to configure G28 all axis resting position for MBL

Marlin/Configuration.h

@@ -525,6 +525,8 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the l
   #define MESH_NUM_Y_POINTS 3
   #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
 
+  //#define MESH_G28_REST_ORIGIN // Enable to make 'G28' all axis to rest at origin [0,0,0]
+
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 
   #if ENABLED(MANUAL_BED_LEVELING)

Marlin/Marlin_main.cpp

@@ -2918,17 +2918,19 @@ inline void gcode_G28() {
     #endif
   #endif
 
-  // For mesh leveling move back to Z=0
+  // Enable mesh leveling again
   #if ENABLED(MESH_BED_LEVELING)
     if (mbl_was_active && home_all_axis) {
       current_position[Z_AXIS] = MESH_HOME_SEARCH_Z;
       sync_plan_position();
       mbl.active = 1;
+      #if ENABLED(MESH_G28_REST_ORIGIN)
         current_position[Z_AXIS] = 0.0;
         set_destination_to_current();
         feedrate = homing_feedrate[Z_AXIS];
         line_to_destination();
         stepper.synchronize();
+      #endif
       #if ENABLED(DEBUG_LEVELING_FEATURE)
         if (DEBUGGING(LEVELING)) DEBUG_POS("mbl_was_active", current_position);
       #endif