Fix focusing of cursor in tipbar. Fixes T3130.

Summary: We weren't passing in the output property causing the tipbar navigation to break.

Test Plan: Cause an error to occur, allowing the tipbar to open up. Click the "Show me" link and make sure that it actually jumps to the correct cursor position.

Reviewers: pamela

Reviewed By: pamela

Maniphest Tasks: T3130

Differential Revision: http://phabricator.khanacademy.org/D12976