Styles for JSONDictWidget in admin site.

Review Request #6998 — Created Feb. 28, 2015 and discarded — Latest diff uploaded

Information

Review Board
master

Reviewers

As a part of the project "Improve Review Bot's admin interface" in https://reviewboard.hackpad.com/Student-Project-Ideas-bWzTgtBtq9f, this change adds styles for JSONDictWidget.
The actual implementation of the functionalities are in https://reviews.reviewboard.org/r/6999/

Browser test done:
1. go to http://localhost:8080/admin/extensions/reviewbotext.extension.ReviewBotExtension/db/reviewbotext/tool/
2. click one of the tools. for example, "PEP8 Style Checker"
3. see if existing profiles' "Tool settings" part is displayed well
4. click "Add another profile"
5. see if newly added profile's "Tool settings" part is displayed well

Some possible edge cases are:
1. there's no existing profiles
2. there's exactly one porfile