Update default.css because of multilining of text through expand/collaps pics on the sidebar.

I think 175px is a good compromise for now... I was also thinking about 200px but that's ~fat
Is it not possible to make those variable-through-translation-areas more dynamical without killing the whole style? I was trying it by myself but ... yeah... quite much rules in there XD
Here are the pics :-)
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before:                         after:                        after 2nd commit
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![before width](https://cloud.githubusercontent.com/assets/6222200/3266465/9f7cfae2-f2b0-11e3-9b15-b830c998017f.png).![after width](https://cloud.githubusercontent.com/assets/6222200/3266466/a7bce1f4-f2b0-11e3-9056-e3ce036bc1d3.png).![final width](https://cloud.githubusercontent.com/assets/6222200/3266514/9285392e-f2b2-11e3-9bd7-dc5485db6640.png)