launch instance wizard takes 10 seconds to load

Opening the "Launch Instance" wizard takes 10 seconds because it executes two remote commands in the UI thread. First it fetches hte profiles, then it fetches hte realms. This should be delayed out as much as possible.

Combos should be created with only one item saying "Loading..." and combo should be disabled. Fetching commands should be launched in another thread, and, upon completion, update the combo with either the proper items or a none-available string. Updates should be done in UI thread of course.