New simplified interface

[brnorris03]

1. Have a dialog for connection information, the default database should be autoperf on brix and should always be available for demo purposes.
2. Add a new interface that fits in a fixed size page and uses scrollable widgets. For example, the list of applications can be arbitrarily long, but should fit in a fixed-height widget (scrollable). All list-based widgets should also have filtering options (plain text matching for now).
3. When a user first connects to the front page, there should be default values for all required user input so that they see some result without having to do anything.
   • Default metric should be TIME, and if not available, the first available metric
   • Default value to show for multiple thread experiments should be the "Mean" of all threads.

[brnorris03]

Some progress on 2 and 3, committed in 30a9de3.