Minor rendering issues when opening details view

[alexanderfloh]

When opening the details view, the list of failed tests is made a bit less wide, causing some text to (line-)break. This increases the overall height of the list, which might result in the currently selected list item being no longer visible, as it is pushed downwards, off screen.

[Peter-Donner]

In IE9 the layout fails (IE10 works and probably no potential Feedbock user uses IE anyway)