Followup to 50af1d1

Marlin/src/gcode/bedlevel/M420.cpp

   }
 
   SERIAL_ECHO_START();
-  SERIAL_ECHOPGM("Bed Leveling ")
+  SERIAL_ECHOPGM("Bed Leveling ");
   serialprintln_onoff(planner.leveling_active);
 
   #if ENABLED(ENABLE_LEVELING_FADE_HEIGHT)

Marlin/src/gcode/bedlevel/mbl/G29.cpp

 
   switch (state) {
     case MeshReport:
+      SERIAL_PROTOCOLPGM("Mesh Bed Leveling ");
       if (leveling_is_valid()) {
-        SERIAL_PROTOCOLPGM("State: ");
         serialprintln_onoff(planner.leveling_active);
         mbl.report_mesh();
       }
       else
-        SERIAL_PROTOCOLLNPGM("Mesh bed leveling has no data.");
+        SERIAL_PROTOCOLLNPGM("has no data.");
       break;
 
     case MeshStart:

Marlin/src/lcd/language/language_en.h

 #ifndef MSG_AUTOTEMP
   #define MSG_AUTOTEMP                        _UxGT("Autotemp")
 #endif
-#ifndef MSG_ON
+#ifndef MSG_LCD_ON
   #define MSG_LCD_ON                          _UxGT("On")
 #endif
-#ifndef MSG_OFF
+#ifndef MSG_LCD_OFF
   #define MSG_LCD_OFF                         _UxGT("Off")
 #endif
 #ifndef MSG_PID_P