Wait before turning off PRINTER_EVENT_LEDS at print end (#10248)

Marlin/src/gcode/gcode.h

     #define KEEPALIVE_STATE(n) NOOP
   #endif
 
+  #if ENABLED(PRINTER_EVENT_LEDS) && ENABLED(SDSUPPORT) && HAS_RESUME_CONTINUE
+    static bool lights_off_after_print;
+  #endif
+
   static void dwell(millis_t time);
 
 private:

Marlin/src/gcode/lcd/M0_M1.cpp

 
 #include "../../sd/cardreader.h"
 
+#if ENABLED(PRINTER_EVENT_LEDS) && ENABLED(SDSUPPORT)
+  bool GcodeSuite::lights_off_after_print;
+  #include "../../feature/leds/leds.h"
+#endif
+
 /**
  * M0: Unconditional stop - Wait for user button press on LCD
  * M1: Conditional stop   - Wait for user button press on LCD
     #endif
   }
 
+  #if ENABLED(PRINTER_EVENT_LEDS) && ENABLED(SDSUPPORT)
+    if (lights_off_after_print) {
+      leds.set_off();
+      lights_off_after_print = false;
+    }
+  #endif
+
   wait_for_user = false;
   KEEPALIVE_STATE(IN_HANDLER);
 }

Marlin/src/gcode/queue.cpp

               LCD_MESSAGEPGM(MSG_INFO_COMPLETED_PRINTS);
               leds.set_green();
               #if HAS_RESUME_CONTINUE
-                enqueue_and_echo_commands_P(PSTR("M0")); // end of the queue!
+                gcode.lights_off_after_print = true;
+                enqueue_and_echo_commands_P(PSTR("M0 S"
+                  #if ENABLED(NEWPANEL)
+                    "1800"
+                  #else
+                    "60"
+                  #endif
+                ));
               #else
-                safe_delay(1000);
+                safe_delay(2000);
+                leds.set_off();
               #endif
-              leds.set_off();
-            #endif
+            #endif // PRINTER_EVENT_LEDS
             card.checkautostart(true);
           }
         }