Link from Task pages to a pop-up screen that lists all the contacts selected for that task (e.g. "who am I adding to the group?")

Since the contacts could span multiple screens - for usability / sanity sake we want to allow people to click on a link in the task page (the add-to-groups etc. page) that shows them all the contacts that have been selected. I think we should do the same for CiviMail where we give the total number of contacts selected for a mailing. Per Deepak's comment on main issue: "Scalable contact name selector driven from a table might be the best solution."