Add Ability to Limit Number and/or Size of Crucible Reviews

There is currently no limit to the size of Crucible reviews that can be created. Because of this, someone can create a MASSIVE review with lots of files (or large files) that can do one of two things:

• Impact the performance of Crucible - the review takes a long time to load and can be slow on the client-side.
• Cause issues indexing data. A large review can cause a repository to get stuck on "Indexing Review Data" for a long time.

We should provide administrators the ability to limit review size by either # of files or size of content.