Sounds really cool and yes the new ide guys wanted a widgets and behavior like that. How about to add Packages?
I needed an entry completion with groups, like Mac's Spotlight. While I was at it, I figured it would also be useful as a UI for the existing Spotlight. So I made a SpotlightMorph, which is a very Mac-like stand-alone Morph, which is a textField + results morph, and an adaptor for EntryCompetion, SpotlightEntryCompletion, which can be passed to #entryCompletion:
A short screencast will be available at https://vimeo.com/82953583 in about 45 minutes.
And here's a screenshot for the impatient ;)
<Screen Shot 2013-12-30 at 9.23.02 AM.png>
To load (tested in Pharo 2.0 latest): Gofer it smalltalkhubUser: 'SeanDeNigris' project: 'SeansPlayground'; package: 'Spotlight'; load.
Then try: SpotlightCompletionExample open. or SpotlightMorphExample exampleFileSearch. or SpotlightMorphExample exampleSmalltalkSearch.