GitHub links don't offer the app from K9 Mail

[chmac]

When I receive a notification email from GitHub and tap on the link to "View this on GitHub", I get a list of browsers as a choice, but not the GitHub app. However, if I tap and hold on the link, then choose Open Link, I now have a choice of apps including the GitHub app. Maybe a bug in K9 Mail or could it be in the GitHub app?

[sudosurootdev]

Probably your email app, cause I just checked and Gmail offers Github app on click.

[chmac]

Maybe. I'm using K9 for email, and links to most apps work as expected. The GitHub app seems to be the odd one out. I wonder if it's something weird about the way the intent is registered or something like that. I'm no android dev, so really have no idea. Just noticed that GitHub links don't work without the long press then Open Link, but most others do. I'll also try filing a bug on the K9 side.

[ZacSweers]

Should be covered by #565