refactor(simu): use SDL & ImGui (#6233)

Co-authored-by: raphaelcoeffic <1050031+raphaelcoeffic@users.noreply.github.com>
Co-authored-by: Malte Langermann <malte@langermann.net>

radio/src/gui/128x64/radio_diagkeys.cpp

@@ -76,7 +76,7 @@ void menuRadioDiagFS(event_t event)
     lcdDrawText(FS_1ST_COLUMN + 7, y, getFSPhysicalState(i) ? STR_CHAR_DOWN : STR_CHAR_UP);
     lcdDrawText(FS_2ND_COLUMN + 5, y, getFSLogicalState(i) ? STR_CHAR_DOWN : STR_CHAR_UP);
 #if defined(FUNCTION_SWITCHES_RGB_LEDS)
-    lcdDrawText(FS_3RD_COLUMN, y, STR_FS_COLOR_LIST[getRGBColorIndex(rgbGetLedColor(i))], 0);
+    lcdDrawText(FS_3RD_COLUMN, y, STR_FS_COLOR_LIST[getRGBColorIndex(fsGetLedRGB(i))], 0);
 #else
     lcdDrawText(FS_3RD_COLUMN, y, STR_OFFON[fsLedState(i)]);
 #endif

radio/src/gui/colorlcd/startup_shutdown.cpp

@@ -102,11 +102,7 @@ void waitSplash()
 {
   // Handle color splash screen
   if (splashStartTime) {
-#if defined(SIMU)
-    // Simulator - inputsMoved() returns true immediately without this!
-    sleep_ms(30);
-#endif  // defined(SIMU)
-
+    inactivityCheckInputs();
     splashStartTime += SPLASH_TIMEOUT;
     while (splashStartTime >= get_tmr10ms()) {
       LvglWrapper::instance()->run();