Switch the framebuffer address rather than using 2 LTDC layers

radio/src/gui/colorlcd/draw_functions.cpp

@@ -76,7 +76,6 @@ void drawValueOrGVar(BitmapBuffer * dc, coord_t x, coord_t y, gvar_t value, gvar
 
 void drawSleepBitmap()
 {
-  lcdNextLayer();
   lcd->reset();
   lcd->clear();
 
@@ -97,7 +96,6 @@ void drawShutdownAnimation(uint32_t duration, uint32_t totalDuration, const char
 
   static const BitmapBuffer * shutdown = BitmapBuffer::loadBitmap(OpenTxTheme::instance()->getFilePath("shutdown.bmp"));
 
-  lcdNextLayer();
   lcd->reset();
 
   if (shutdown) {
@@ -431,4 +429,4 @@ void drawHexNumber(BitmapBuffer * dc, coord_t x, coord_t y, uint32_t val, LcdFla
     c += (c >= 10 ? 'A' - 10 : '0');
     x = dc->drawSizedText(x, y, &c, 1, flags);
   }
-}
+}