Unsafe parameter handling

[Raza Ali]

Exceptions can be triggered by the user tinkering about with various parts of the URL in different pages. This is partly due to errors in parameter handling (not checking for invalid values), but also to do with how URL mapping is currently configured in Grails (/controller/action/{id}). Sanity checks need to be performed.

[Raza Ali]

From manual testing, this seems to have been resolved. Please re-open with the particular URL if/when any issues are found.