Add the move_z_after_probing() functionality to UBL's G29 J

Marlin/src/feature/bedlevel/ubl/ubl_G29.cpp

@@ -1563,6 +1563,11 @@
           }
         }
         
+        STOW_PROBE();
+        #ifdef Z_AFTER_PROBING
+          move_z_after_probing();
+        #endif
+        
         if (abort_flag) {
           SERIAL_ECHOPGM("?Error probing point.  Aborting operation.\n");
           return;
@@ -1618,8 +1623,11 @@
 
           zig_zag ^= true;
         }
-        STOW_PROBE();
       }
+      STOW_PROBE();
+      #ifdef Z_AFTER_PROBING
+        move_z_after_probing();
+      #endif
       
       if (abort_flag || finish_incremental_LSF(&lsf_results)) {
         SERIAL_ECHOPGM("Could not complete LSF!");