Change the position of the Browse tab in the local task order

Found a few relatively minor code quality things, and one bigger concern that I'm thinking can result in false positives if we don't correct it. Otherwise, looks straightforward to me.

I believe all the threads are resolved except for that huge one where I pasted the entire markup (RIP your scrollbar). Anyone want to take another look?

Following the usability study done with University of Minnesota, it became clear that browse really must be the FIRST tab, and therefore the default task for "Extend."

I've updated the proposed resolution. Marking "Needs Work"

Merged this because it gets us started and gets us a test, and we still need to discuss whether or not to make it the default tab (I believe so, but there is not consensus). There is another issue for that, so I like leaving this one.

Tests did fail, but they were separate fails on flaky FunctionalJavascript tests.

Automatically closed - issue fixed for 2 weeks with no activity.