Backlash cleanup (#13659)

…And save backlash, fil. sensor, ExtUI userdata to EEPROM.

Marlin/src/inc/Conditionals_LCD.h

@@ -516,6 +516,9 @@
   #define GRID_MAX_POINTS ((GRID_MAX_POINTS_X) * (GRID_MAX_POINTS_Y))
 #endif
 
+#if ENABLED(MALYAN_LCD)
+  #define EXTENSIBLE_UI
+#endif
 #define HAS_SOFTWARE_ENDSTOPS EITHER(MIN_SOFTWARE_ENDSTOPS, MAX_SOFTWARE_ENDSTOPS)
 #define HAS_RESUME_CONTINUE   ANY(EXTENSIBLE_UI, NEWPANEL, EMERGENCY_PARSER)
 #define HAS_COLOR_LEDS        ANY(BLINKM, RGB_LED, RGBW_LED, PCA9632, PCA9533, NEOPIXEL_LED)

Marlin/src/inc/SanityCheck.h

@@ -613,6 +613,8 @@ static_assert(Y_MAX_LENGTH >= Y_BED_SIZE, "Movement bounds (Y_MIN_POS, Y_MAX_POS
     #error "FILAMENT_RUNOUT_SENSOR with NUM_RUNOUT_SENSORS > 5 requires FIL_RUNOUT6_PIN."
   #elif DISABLED(SDSUPPORT, PRINTJOB_TIMER_AUTOSTART)
     #error "FILAMENT_RUNOUT_SENSOR requires SDSUPPORT or PRINTJOB_TIMER_AUTOSTART."
+  #elif FILAMENT_RUNOUT_DISTANCE_MM < 0
+    #error "FILAMENT_RUNOUT_DISTANCE_MM must be greater than or equal to zero."
   #elif DISABLED(ADVANCED_PAUSE_FEATURE)
     static_assert(NULL == strstr(FILAMENT_RUNOUT_SCRIPT, "M600"), "ADVANCED_PAUSE_FEATURE is required to use M600 with FILAMENT_RUNOUT_SENSOR.");
   #endif
@@ -1784,7 +1786,7 @@ static_assert(Y_MAX_LENGTH >= Y_BED_SIZE, "Movement bounds (Y_MIN_POS, Y_MAX_POS
   + ENABLED(OLED_PANEL_TINYBOY2) \
   + ENABLED(ZONESTAR_LCD) \
   + ENABLED(ULTI_CONTROLLER) \
-  + ENABLED(EXTENSIBLE_UI)
+  + (ENABLED(EXTENSIBLE_UI) && DISABLED(MALYAN_LCD))
   #error "Please select no more than one LCD controller option."
 #endif