TM: Allow to resume without a running print

If there is no running print, and the printer is Stopped, add a new
"Acknowledge error" menu entry to unlock the printer.

This simply calls lcd_print_stop(), which is identical in behavior to a
thermal error with a running print.

Firmware/messages.cpp

@@ -165,6 +165,7 @@ extern const char MSG_PAUSED_THERMAL_ERROR[] PROGMEM_I1 = ISTR("PAUSED THERMAL E
 #ifdef TEMP_MODEL
 extern const char MSG_THERMAL_ANOMALY[] PROGMEM_I1 = ISTR("THERMAL ANOMALY");////MSG_THERMAL_ANOMALY c=20
 extern const char MSG_TM_NOT_CAL[] PROGMEM_I1 = ISTR("Temp model not calibrated yet.");////MSG_TM_NOT_CAL c=20 r=4
+extern const char MSG_ACK_ERROR[] PROGMEM_I1 = ISTR("Acknowledge error");////MSG_ACK_ERROR c=17
 #endif
 extern const char MSG_NOZZLE_CNG_MENU [] PROGMEM_I1 = ISTR("Nozzle change");////MSG_NOZZLE_CNG_MENU c=18
 extern const char MSG_NOZZLE_CNG_READ_HELP [] PROGMEM_I1 = ISTR("For a Nozzle change please read\nprusa.io/nozzle-mk3s");////MSG_NOZZLE_CNG_READ_HELP c=20 r=4

Firmware/messages.h

@@ -169,6 +169,7 @@ extern const char MSG_PAUSED_THERMAL_ERROR[];
 #ifdef TEMP_MODEL
 extern const char MSG_THERMAL_ANOMALY[];
 extern const char MSG_TM_NOT_CAL[];
+extern const char MSG_ACK_ERROR[];
 #endif
 extern const char MSG_NOZZLE_CNG_MENU [];
 extern const char MSG_NOZZLE_CNG_READ_HELP [];

Firmware/ultralcd.cpp

@@ -5637,6 +5637,11 @@ static void lcd_main_menu()
     if((IS_SD_PRINTING || usb_timer.running() || isPrintPaused) && (custom_message_type != CustomMsg::MeshBedLeveling)) {
         MENU_ITEM_SUBMENU_P(_T(MSG_STOP_PRINT), lcd_sdcard_stop);
     }
+#ifdef TEMP_MODEL
+    else if(Stopped) {
+        MENU_ITEM_SUBMENU_P(_T(MSG_ACK_ERROR), lcd_print_stop);
+    }
+#endif
 #ifdef SDSUPPORT //!@todo SDSUPPORT undefined creates several issues in source code
     if (card.cardOK || lcd_commands_type == LcdCommands::Layer1Cal) {
         if (!card.isFileOpen()) {