WinRT: Miscellaneous app-backgrounding/restoring event fixes and additions SDL_WINDOWEVENT_FOCUS_LOST is now sent when an app's native window is hidden. Likewise, SDL_WINDOWEVENT_FOCUS_GAINED is sent when an app's window is shown. This mimicks behavior seen on iOS and Android. SDL_WINDOWEVENT_MINIMIZED and SDL_WINDOWEVENT_RESTORED are now sent when the app's native window is hidden and shown. Previously, these were sent when an app was suspended and resumed. On Windows 8.x/RT, an app may be sent to the background without being suspended, which previously meant that SDL_WINDOWEVENT_MINIMIZED might never have been sent. (On Windows Phone 8, however, this seems to be different, whereby apps sent to the background appear to always get suspended.)