sim: change brightness only when screen is on (#66)

Fixes: #45

Author: NeroBurner

main.cpp

@@ -668,9 +668,9 @@ class Framework {
       } else if (key == 'C') {
         batteryController.isCharging = false;
         batteryController.isPowerPresent = false;
-      } else if (key == 'l') {
+      } else if (key == 'l' && !screen_off_created) {
         brightnessController.Higher();
-      } else if (key == 'L') {
+      } else if (key == 'L' && !screen_off_created) {
         brightnessController.Lower();
       } else if (key == 'p') {
         this->print_memory_usage = true;