fix long subnav

When many optional features are activated (norms, maps, ...) the subnav might get to large to fit besides the searchbox. In that case the searchbox is displayed below the subnav. As many themes (including the default) display the subnav as tabs this looks broken.

This fixes that by simply switching subnav and searchbox in the template. 

![subnav_broken](https://f.cloud.github.com/assets/202576/1027048/b303937c-0e69-11e3-8361-ab042ef526b6.png)

![subnav_fixed](https://f.cloud.github.com/assets/202576/1027050/b51f1410-0e69-11e3-94f5-9d10d95ad86f.png)