Restore legacy TAZ probe point sequence (T1538)

- Modified Marlin to begin the probe sequence at the washer below the wiper pad.

Marlin/Conditionals_LulzBot.h

@@ -13,7 +13,7 @@
  * got disabled.
  */
 
-#define LULZBOT_FW_VERSION ".62" // Change this with each update
+#define LULZBOT_FW_VERSION ".63" // Change this with each update
 
 #if ( \
     !defined(LULZBOT_Gladiola_Mini) && \
@@ -462,9 +462,15 @@
   // using a degenerate 2x2 grid. This is the traditional behavior.
   #define LULZBOT_GRID_MAX_POINTS_X            2
   #define LULZBOT_GRID_MAX_POINTS_Y            2
+  #if defined(LULZBOT_IS_MINI)
     // We can't control the order of probe points exactly, but
     // this makes the probe start closer to the wiper pad.
     #define LULZBOT_PROBE_Y_FIRST
+  #else
+    // Restore the old probe sequence on the TAZ that starts
+    // probing on the washer underneath the wiper pad.
+    #define LULZBOT_LAST_PROBE_POINT_ON_BACK_LEFT_CORNER
+  #endif
 #endif
 
 /* Auto-leveling was introduced on the Mini and TAZ 6.

Marlin/Marlin_main.cpp

@@ -4950,7 +4950,11 @@ void home_all_axes() { gcode_G28(true); }
 
       #if ABL_GRID
 
+        #if defined(LULZBOT_LAST_PROBE_POINT_ON_BACK_LEFT_CORNER)
+        bool zig = !(PR_OUTER_END & 1);  // Always end at LEFT and BACK_PROBE_BED_POSITION
+        #else
         bool zig = PR_OUTER_END & 1;   // Always end at RIGHT and BACK_PROBE_BED_POSITION
+        #endif
 
         // Outer loop is Y with PROBE_Y_FIRST disabled
         for (uint8_t PR_OUTER_VAR = 0; PR_OUTER_VAR < PR_OUTER_END && !isnan(measured_z); PR_OUTER_VAR++) {