Removed a false compatibility risk title attribute

The title attribute of the compatibility risk color has a static text that does not reflect the state of the world. It looks like it only really matches the green color (which means overall acceptance of the feature).
I am not sure what the text should be for each color, but the lesser evil is to not lie.
Clarified the compatibility risk title.

The previous compatibility risk title was unclear to me in that it made me think it is the risk status itself, instead of the meaning of the term. @ebidel suggested a clearer wording.
Merge pull request #130 from phistuck/master

Clarified the compatibility risk title