Sdk/2231

Refine the yelp design to more closely match the eos-help-center designs

[endlessm/eos-sdk#2231]
I left that on purpose, because I wanted to change as few lines of the original code as possible, so that any updates would be more likely to apply cleanly. e.g. if we wanted to update to Yelp 3.14 in a few months. This line was just longer than the heretofore maximum width.