BLTOUCH tweaks, new v3.1 command (#14015)

Marlin/src/gcode/calibrate/G28.cpp

@@ -237,10 +237,6 @@ void GcodeSuite::G28(const bool always_home_all) {
     workspace_plane = PLANE_XY;
   #endif
 
-  #if ENABLED(BLTOUCH)
-    bltouch.init();
-  #endif
-
   // Always home with tool 0 active
   #if HOTENDS > 1
     #if DISABLED(DELTA) || ENABLED(DELTA_HOME_TO_SAFE_ZONE)
@@ -353,6 +349,9 @@ void GcodeSuite::G28(const bool always_home_all) {
     // Home Z last if homing towards the bed
     #if Z_HOME_DIR < 0
       if (doZ) {
+        #if ENABLED(BLTOUCH)
+          bltouch.init();
+        #endif
         #if ENABLED(Z_SAFE_HOMING)
           home_z_safely();
         #else