restore red background colour in check list views, fixes #419

I've removed any colour from the entity column as that was a bit of a lie anyway (just used the status of the first check).

The problem was caused by the upgrade to bootstrap 3 which now uses "danger" instead of "error" for the red colour. 

Addresses #419 

Looks like this:

![screen shot 2014-01-16 at 1 19 46 pm](https://f.cloud.github.com/assets/391439/1927399/e746afa0-7e5a-11e3-85d4-a824828d1b45.png)