Delete a service

- Puts a delete button at the bottom of every summary page
- Button takes supplier to same page with banner and button at top asking if they want to confirm deletion
- When deleted the user is sent back to dashboard

**Note: needs `grunt dev` running for styling of new banner to appear**
Sorry, missed that, for some reason file search didn't find it... (ah, OK, had filter to .java set, doh!). 
So why up to 20?  And why does the summary page show 36 questions, not just the "max" of 20?