Sorry for the late reply, I was gone for the holidays (and I guess most other "Faatal's Little Helpers" were as well). Now I'm answering what I can while giving my cat some much anticipated loving in the form of a purr and a pat.
On your Quest Watch list, there should be four round buttons. The third of these toggles questgiver display - beige for all, blue for dailies only, and dim for off.