Offer well for setting new FluidInstance dock icon

Thought I'd mock this up to give you a better idea of the concept, but rather than pick from "use favicon" and a dropdown-to-filepicker combo, I thought a visual approach would be better... I also thought that, if I put in a URL, hit tab, you could auto-fetch the favicon or iPhone icon from the site and put it in the well so I could preview it and then find an alternative if the default sucks.



Thoughts?