Pressing Enter in the Domain entry of Auth dialog submits

[iivorait]

In the authentication dialog where the user name, password and domain are entered, currently the dialog is submitted by pressing the Enter key only in the password entry. With this modification, pressing the Enter key in the domain entry submits the dialog, too. Since the domain entry is the last entry of the form, I often try to submit the form by pressing the Enter key in vain.

[antenore]

Thanks a lot, we will test this ASAP

[antenore]

It's fine for me.

@iivorait I'll add you in the contributors list and in the About widget before the next release.

Thanks a lot for our support!

@giox069 I'm going to merge this