Ability to login on Enter keypress on inputs

[TabulateJarl8]

Hey! First of all, thanks for all the work being done on this!

I was setting up Glance and noticed something slightly annoying for me, so I figured that I would add it since it's only a few lines of code. Currently, you can't press enter to submit the login form, so I added two keydown event listeners on the username and password inputs.

Let me know what you think of this or if I should do anything differently.