imp - Timeout now gets cleared instantly

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We've changed the timeout so that it uses spin lock instead of the normal Thread.Sleep() function. This ensures that we clear the timeout as soon as the user presses any key.

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Type: imp
Breaking: False
Doc Required: False
Part: 1/1

GRILO.Bootloader/Boot/Style/BootStyleManager.cs

@@ -229,7 +229,7 @@ private static void SelectTimeoutHandler(int timeout)
                     buffer.AddDynamicText(() => style.RenderSelectTimeout(timeout - timeoutElapsed));
                     BootloaderMain.bootloaderScreen.AddBufferedPart("Timeout", buffer);
                     ScreenTools.Render();
-                    Thread.Sleep(1000);
+                    SpinWait.SpinUntil(() => !BootloaderState.WaitingForFirstBootKey, 1000);
                     BootloaderMain.bootloaderScreen.RemoveBufferedPart("Timeout");
                     timeoutElapsed += 1;
                 }