Add dropdown fields for review requests.

Review Request #9157 — Created Aug. 29, 2017 and submitted — Latest diff uploaded

Information

Review Board
release-3.0.x
cb64f1f...

Reviewers

This change adds Python and JavaScript classes to add dropdown-type fields in
review requests. Extensions can use this very simply by just subclassing
BaseDropdownField and providing field_id, label, and options attributes.
The resulting value will be stored in extra_data as expected.

  • Ran js-tests.
  • Ran unit tests.
  • Created a test extension that used a dropdown field and verified that the
    state was correctly rendered when loading the page and correctly stored
    when the dropdown was changed.