Allow using enter instead of (or in addition to) tabstop to move to next template field

[vjpr]

No description provided.

[sygint]

Just tested, this seems to work in the newest Atom at least

[bronson]

@gnarmedia I don't think it does... At least in Ruby and Rust, when I hit return inside a template field, I just get a new line. It doesn't skip to the next field.