Help order

Fix menu order 
see https://trac.openmicroscopy.org.uk/ome/ticket/11530

To test:
 * open insight
 * Go to the help menu

Menu before
![helpmenubefore](https://f.cloud.github.com/assets/1022396/1388695/f3203964-3bc4-11e3-9d52-4fa83f9b0af8.png)

Menu After

![helpmenuafter](https://f.cloud.github.com/assets/1022396/1388697/fe18de98-3bc4-11e3-9dd2-20da64e2abab.png)