Makes the menu user avatar link to the user profile

[davidgomes]

I believe the first link on this dropdown should go to the user's profile in Open VSX, and not to their GitHub URL, that's rather confusing.

[netomi]

ty for the contribution. I agree that having the first link go to the github profile is a bit confusing as I was hitting that myself several times. However, there is already the settings item that navigates to the profile page, so doing that change would duplicate that.