Merge pull request #5580 from k9mail/bring_app_to_front

    public override fun onCreate(savedInstanceState: Bundle?) {

        super.onCreate(savedInstanceState)

        // If the app's main task was not created using the default launch intent (e.g. from a notification, a widget,

        // or a shortcut), using the app icon to "launch" the app will create a new MessageList instance instead of only

        // bringing the app's task to the foreground. We catch this situation here and simply finish the activity. This

        // will bring the task to the foreground, showing the last active screen.

        if (intent.action == Intent.ACTION_MAIN && intent.hasCategory(Intent.CATEGORY_LAUNCHER) && !isTaskRoot) {

            Timber.v("Not displaying MessageList. Only bringing the app task to the foreground.")

            finish()

            return

        }

        val accounts = preferences.accounts

        deleteIncompleteAccounts(accounts)

        val hasAccountSetup = accounts.any { it.isFinishedSetup }