Bug 1078985 - Vertically align resultset bar contents

This fixes Bugzilla bug [1078985](https://bugzilla.mozilla.org/show_bug.cgi?id=1078985).

The contents of the resultset container weren't completely aligned. As per the screen grab below, it's just one of those small layout/polish things. It's subtle, but like looking at a picture frame that isn't level, it's kind of distracting.

Here is the current, at 2:1 res:

![resultsetalignment](https://cloud.githubusercontent.com/assets/3660661/4537118/ef7d12a0-4dd4-11e4-9943-ba8087917714.jpg)


Here is the fix, at 1:1 res:

![resultsetproposed](https://cloud.githubusercontent.com/assets/3660661/4537147/a82c85ec-4dd5-11e4-83bd-b6d73d79fcee.jpg)

I had a look at the other items in the row and everything else seemed ok, just the Date/Id was off. So this tweak makes the flexbox change.

Tested on Windows:
FF Release **32.0.3**
Chrome Latest Release **37.0.2062.124 m**

Adding @wlach for review as our flexbox mentor.