Add generic connection/database selection dialog

Modal dialog should have the ability to provide the following capabilities:

* Option to browse only to server/connection or also expand to database
* Search to filter (profile name, server name, database)
* Hover to see more details
* Double-click to select and close, or single-click to select (with explicit "select" button)
* Display in same order as Object Explorer
* Display in folders, same tree as Object Explorer

For use in Dacpac dialog and Schema Compare endpoint selection