Fix unit tests on Internet Explorer and Edge.

Review Request #9451 — Created Dec. 18, 2017 and submitted — Latest diff uploaded

Information

Djblets
release-1.0.x
bd45e41...

Reviewers

The unit tests for ListEditView added new ES6 syntactic sugar into a
template string, which bypasses Babel. This ended up breaking tests on
IE and Edge (and anything else that doesn't understand the syntax being
used). This change fixes this to use more traditional syntax.

Ran unit tests on Chrome, Firefox, Edge, and IE.