admin syndication - ebay template chooser bug fix

The template chooser, if opened twice during a session, threw a JS error
due to destroy having been run. createDialog now destroys and then
empty/removes dialog content (which is what I wanted it to do all along
anyway).
admin syndication - ebay

update to the UI.  ebay now has a page more like the other syndications.
It lists the tokens and profiles and allows for some high level
settings.