Erros in auth dialog when using https

[guillep]

Pharo 12.0.0 Build information: Pharo-12.0.0+SNAPSHOT.build.1390.sha.6cefa1c3d575720237036249a266e167366ab7d9 (64 Bit)

• Use an HTTPS remote with no credentials attached
• attempt a push, this will open the auth popup

Error 1: close it with Cmd+W or cancel (after filling the fields)

Error 2: click on ok with empty user or pass

We have an untrapped exception.

[estebanlm]

error 1: it was a problem of strict mode that is already fixed.