Disable steppers on M112 (#15065)

And change verbiage to not refer to "Emergency Stop."

Marlin/src/gcode/control/M108_M112_M410.cpp

@@ -38,10 +38,10 @@ void GcodeSuite::M108() {
 }
 
 /**
- * M112: Emergency Stop
+ * M112: Full Shutdown
  */
 void GcodeSuite::M112() {
-  kill();
+  kill(PSTR("M112 Shutdown"), true);
 }
 
 /**

Marlin/src/gcode/control/M80_M81.cpp

@@ -86,7 +86,7 @@
 /**
  * M81: Turn off Power, including Power Supply, if there is one.
  *
- *      This code should ALWAYS be available for EMERGENCY SHUTDOWN!
+ *      This code should ALWAYS be available for FULL SHUTDOWN!
  */
 void GcodeSuite::M81() {
   thermalManager.disable_all_heaters();

Marlin/src/gcode/gcode.cpp

@@ -407,7 +407,7 @@ void GcodeSuite::process_parsed_command(const bool no_ok/*=false*/) {
 
       #if DISABLED(EMERGENCY_PARSER)
         case 108: M108(); break;                                  // M108: Cancel Waiting
-        case 112: M112(); break;                                  // M112: Emergency Stop
+        case 112: M112(); break;                                  // M112: Full Shutdown
         case 410: M410(); break;                                  // M410: Quickstop - Abort all the planned moves.
         #if ENABLED(HOST_PROMPT_SUPPORT)
           case 876: M876(); break;                                  // M876: Handle Host prompt responses

Marlin/src/gcode/gcode.h

@@ -132,7 +132,7 @@
  *        If AUTOTEMP is enabled, S<mintemp> B<maxtemp> F<factor>. Exit autotemp by any M109 without F
  * M110 - Set the current line number. (Used by host printing)
  * M111 - Set debug flags: "M111 S<flagbits>". See flag bits defined in enum.h.
- * M112 - Emergency stop.
+ * M112 - Full Shutdown.
  * M113 - Get or set the timeout interval for Host Keepalive "busy" messages. (Requires HOST_KEEPALIVE_FEATURE)
  * M114 - Report current position.
  * M115 - Report capabilities. (Extended capabilities requires EXTENDED_CAPABILITIES_REPORT)