Change Dictionary Browse & Edit view to use a flat DetailList

This replaces the approach that nested DetailLists inside DetailLists.

Change-Id: I16e68915da11be543a15935d84f7995f3ce8e131
Make unzip overwrite files without prompting

Sometime (not all the time) when extracting the Mercurial zip file,
unzip will prompt to overwrite files.

Change-Id: Ica821f73b179915f6cf5eb6b2f6cc7190698f6c8