Changed OidcBrowser url from 127.0.0.1 to localhost. Fixes #301.

[Jackabomb]

Fix #301 affecting pre-Windows 10 devices. I know Windows 7 is out-of-support, but in this case the fix is trivial.

Changes the redirect URL for Oidc to use 'localhost' instead of '127.0.0.1'. Windows seems to block opening the port prior to Windows 10 if it uses anything other than localhost.

I've tested on two machines, one with Win7 and the other with Win10.

[Jackabomb]

Also fixes #347 and most likely fixes #365.