Here is the greasemonkey script that can only expand/collapse codes blocks

[Install][1] - [Source][2] - (tested on firefox and chrome dev only)

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### Screen shots 1
![enter image description here][3]
### to
![enter image description here][4]

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### Screen shots 2
![enter image description here][5]
### to
![enter image description here][6]

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 [1]: http://userscripts.org/scripts/source/98152.user.js
 [2]: http://userscripts.org/scripts/review/98152
 [3]: https://i.sstatic.net/LxlUk.png
 [4]: https://i.sstatic.net/6hI4M.png
 [5]: https://i.sstatic.net/dbnd3.png
 [6]: https://i.sstatic.net/RUmWR.png