Filling in more places where Z_PROBE_PIN and Z_PROBE_AND_ENDSTOP need to

be.
Added Sanity Check for it.
Added hook so it's enabled.

Marlin/Marlin_main.cpp

     
     st_synchronize();
     
+    #if defined(Z_PROBE_AND_ENDSTOP)
+    bool z_probe_endstop = (READ(Z_PROBE_PIN) != Z_PROBE_ENDSTOP_INVERTING);
+    if (z_probe_endstop)
+    #else
     bool z_min_endstop = (READ(Z_MIN_PIN) != Z_MIN_ENDSTOP_INVERTING);
     if (z_min_endstop)
+    #endif
     {
         if (!Stopped)
         {

Marlin/SanityCheck.h

      * Require a Z Min pin
      */
     #if Z_MIN_PIN == -1
-      #ifdef Z_PROBE_REPEATABILITY_TEST
-        #error You must have a Z_MIN endstop to enable Z_PROBE_REPEATABILITY_TEST.
-      #else
-        #error ENABLE_AUTO_BED_LEVELING requires a Z_MIN endstop. Z_MIN_PIN must point to a valid hardware pin.
+      #if Z_PROBE_PIN == -1
+        #ifdef Z_PROBE_REPEATABILITY_TEST
+          #error You must have a Z_MIN endstop to enable Z_PROBE_REPEATABILITY_TEST.
+        #else
+          #error ENABLE_AUTO_BED_LEVELING requires a Z_MIN or Z_PROBE endstop. Z_MIN_PIN or Z_PROBE_PIN must point to a valid hardware pin.
+        #endif
       #endif
     #endif
-
     /**
      * Check if Probe_Offset * Grid Points is greater than Probing Range
      */

Marlin/pins.h

   #define Z_MIN_PIN          -1
 #endif
 
-#define SENSITIVE_PINS { 0, 1, X_STEP_PIN, X_DIR_PIN, X_ENABLE_PIN, X_MIN_PIN, X_MAX_PIN, Y_STEP_PIN, Y_DIR_PIN, Y_ENABLE_PIN, Y_MIN_PIN, Y_MAX_PIN, Z_STEP_PIN, Z_DIR_PIN, Z_ENABLE_PIN, Z_MIN_PIN, Z_MAX_PIN, PS_ON_PIN, \
+#define SENSITIVE_PINS { 0, 1, X_STEP_PIN, X_DIR_PIN, X_ENABLE_PIN, X_MIN_PIN, X_MAX_PIN, Y_STEP_PIN, Y_DIR_PIN, Y_ENABLE_PIN, Y_MIN_PIN, Y_MAX_PIN, Z_STEP_PIN, Z_DIR_PIN, Z_ENABLE_PIN, Z_MIN_PIN, Z_MAX_PIN, Z_PROBE_PIN, PS_ON_PIN, \
                         HEATER_BED_PIN, FAN_PIN, \
                         _E0_PINS _E1_PINS _E2_PINS _E3_PINS \
                         analogInputToDigitalPin(TEMP_BED_PIN) \