Add speed configuration for home-bumping movement

Marlin/example_configurations/SCARA/Configuration.h

@@ -443,6 +443,8 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
     #define FRONT_PROBE_BED_POSITION 20
     #define BACK_PROBE_BED_POSITION 170
 
+    #define MIN_PROBE_EDGE 10 // The probe square sides can be no smaller than this    
+    
     // Set the number of grid points per dimension
     // You probably don't need more than 3 (squared=9)
     #define AUTO_BED_LEVELING_GRID_POINTS 2

Marlin/example_configurations/SCARA/Configuration_adv.h

@@ -214,6 +214,7 @@
 #define X_HOME_RETRACT_MM 3
 #define Y_HOME_RETRACT_MM 3
 #define Z_HOME_RETRACT_MM 3
+#define HOMING_BUMP_DIVISOR {10, 10, 20}  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 //#define QUICK_HOME  //if this is defined, if both x and y are to be homed, a diagonal move will be performed initially.
 #ifdef SCARA
 	#define QUICK_HOME //SCARA needs Quickhome