Fix and improve POWER_LOSS_RECOVERY (#11187)

Marlin/src/lcd/language/language_en.h

@@ -666,6 +666,9 @@
 #ifndef MSG_STOP_PRINT
   #define MSG_STOP_PRINT                      _UxGT("Stop print")
 #endif
+#ifndef MSG_POWER_LOSS_RECOVERY
+  #define MSG_POWER_LOSS_RECOVERY             _UxGT("Power-Loss Recovery")
+#endif
 #ifndef MSG_CARD_MENU
   #define MSG_CARD_MENU                       _UxGT("Print from SD")
 #endif