Resolve "[Kotahidev] Comments and suggestions dropdown list issue"

Closes #855 (closed). The comments and suggestions dropdown was wrapping in Firefox (not the case in Mac Safari/Chrome); this changes the CSS to drop the size down to 15px so that it doesn't wrap.

This fixes the problem, but I think it's indicative of an underlying design problem, that we're not specifying the fonts that are being used, and thus each browser/OS is going to look slightly differently. We should have a standard font for the interface!