mbl.active is a bool now

Marlin/Marlin_main.cpp

    */
   #if ENABLED(MESH_BED_LEVELING)
     uint8_t mbl_was_active = mbl.active;
-    mbl.active = 0;
+    mbl.active = false;
   #endif
 
   setup_for_endstop_move();
           // After recording the last point, activate the mbl and home
           SERIAL_PROTOCOLLNPGM("Mesh probing done.");
           probe_point = -1;
-          mbl.active = 1;
+          mbl.active = true;
           enqueue_and_echo_commands_P(PSTR("G28"));
         }
         break;

Marlin/configuration_store.cpp

   home_offset[X_AXIS] = home_offset[Y_AXIS] = home_offset[Z_AXIS] = 0;
 
   #if ENABLED(MESH_BED_LEVELING)
-    mbl.active = 0;
+    mbl.active = false;
   #endif
 
   #if ENABLED(AUTO_BED_LEVELING_FEATURE)

Marlin/mesh_bed_leveling.h

 
   class mesh_bed_leveling {
   public:
-    uint8_t active;
+    bool active;
     float z_offset;
     float z_values[MESH_NUM_Y_POINTS][MESH_NUM_X_POINTS];
 

Marlin/ultralcd.cpp

           current_position[Z_AXIS] = MESH_HOME_SEARCH_Z;
           line_to_current(Z_AXIS);
           st_synchronize();
-          mbl.active = 1;
+          mbl.active = true;
           enqueue_and_echo_commands_P(PSTR("G28"));
         }
         else {