[AAE] Make the data element field wider

This is strictly a convenience/aesthetic thing, but it would be great to see the full name (or at least more of the name) of Data Elements (specifically in the Adobe Analytics extension in rules). Right now it's something like this:

It would be nice for it to instead be like this:

(for the record, I mocked that up by taking a guess and changing the class on that field from "coral-Textfield Field--short" to "coral-Textfield Field--long"- so the CSS for this already exists:))