[Merge] lp:~kai-mast/friends-app/new-postview into lp:friends-app

[Kai Mast]

It looks fine now in my opinion. I also made the reply area a little bigger as there is now space (maybe we should make its size dynamic depending on its content in the future).

Please review again and merge if you are happy with it.
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https://code.launchpad.net/~kai-mast/friends-app/new-postview/+merge/197537
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