♻️ Display sleep minutes, encoder disable option (#24618)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

Marlin/src/lcd/tft/touch.cpp

@@ -302,7 +302,7 @@ bool Touch::get_point(int16_t *x, int16_t *y) {
         WRITE(TFT_BACKLIGHT_PIN, HIGH);
       #endif
     }
-    next_sleep_ms = millis() + SEC_TO_MS(TOUCH_IDLE_SLEEP);
+    next_sleep_ms = millis() + SEC_TO_MS(ui.sleep_timeout_minutes * 60);
   }
 
 #endif // HAS_TOUCH_SLEEP