Bring WDi3 example up to date

config/examples/Wanhao/Duplicator i3 2.1/Configuration.h

@@ -757,36 +757,39 @@
 #define DEFAULT_TRAVEL_ACCELERATION   700    // X, Y, Z acceleration for travel (non printing) moves
 
 /**
- * Junction Deviation
- *
- * Use Junction Deviation instead of traditional Jerk Limiting
- *
- * See:
- *   https://reprap.org/forum/read.php?1,739819
- *   http://blog.kyneticcnc.com/2018/10/computing-junction-deviation-for-marlin.html
- */
-//#define JUNCTION_DEVIATION
-#if ENABLED(JUNCTION_DEVIATION)
-  #define JUNCTION_DEVIATION_MM 0.02  // (mm) Distance from real junction edge
-#endif
-
-/**
- * Default Jerk (mm/s)
+ * Default Jerk limits (mm/s)
  * Override with M205 X Y Z E
  *
  * "Jerk" specifies the minimum speed change that requires acceleration.
  * When changing speed and direction, if the difference is less than the
  * value set here, it may happen instantaneously.
  */
-#if DISABLED(JUNCTION_DEVIATION)
-  #define DEFAULT_XJERK 8.0
-  #define DEFAULT_YJERK 8.0
-  #define DEFAULT_ZJERK 0.4
+//#define CLASSIC_JERK
+#if ENABLED(CLASSIC_JERK)
+  #define DEFAULT_XJERK  8.0
+  #define DEFAULT_YJERK  8.0
+  #define DEFAULT_ZJERK  0.4
+
+  //#define LIMITED_JERK_EDITING        // Limit edit via M205 or LCD to DEFAULT_aJERK * 2
+  #if ENABLED(LIMITED_JERK_EDITING)
+    #define MAX_JERK_EDIT_VALUES { 20, 20, 0.6, 10 } // ...or, set your own edit limits
+  #endif
 #endif
 
 #define DEFAULT_EJERK    5.0  // May be used by Linear Advance
 
 /**
+ * Junction Deviation Factor
+ *
+ * See:
+ *   https://reprap.org/forum/read.php?1,739819
+ *   http://blog.kyneticcnc.com/2018/10/computing-junction-deviation-for-marlin.html
+ */
+#if DISABLED(CLASSIC_JERK)
+  #define JUNCTION_DEVIATION_MM 0.02  // (mm) Distance from real junction edge
+#endif
+
+/**
  * S-Curve Acceleration
  *
  * This option eliminates vibration during printing by fitting a Bézier