Dirty content restored incorrectly when navigating back from pull request link

[mlewand]

1. Open a PR with some review comments in it.
2. Start typing a response in one of the review comments.
3. Without submitting the comment click on the "view changes" link.
4. Navigate back in the browser history.

Expected

Former content being preserved.

Actual

There are two editors, and toolbar is not rendered correctly.

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There's a (lenghty) GIF showing how it looks like:

[fredck]

There are two editors, and toolbar is not rendered correctly.

This is a dup of #55, which has been fixed.

There's a (lenghty) GIF showing how it looks like

The gif is not working for me... it shows as an static image... but I assume this is something like the one we see in #55.

Former content being preserved.

This is the valid part of this issue, I assume. Needs check.

[fredck]

Good part of this issue has been now fixed with #68.

The result is not totally right still in Pull Request pages though. That's because it uses pjax when switching between its tabs. Although #68 solves most of the pjax integration, the data update still suffers because of defunkt/jquery-pjax#721. Basically, the editor is not able to update the textarea before pjax takes a snapshot of the current dom.

I'll keep on investigating this issue and hopefully something will pop out.