Removed "no use cases" placeholder from editing view.
Added leading slash to /login link to avoid problems in subdirectories (like /detail).
Removed outdated "debugger" statement.
Added expanded check to make it easier to clear out array values (like uses) when submitting updates.
Updated record saving to avoid parsing JSON object and stripping empty elements.  Updates will now be sent as JSON instead of form variables.  Needed to allow users to submit empty fields (like "uses") to clear the existing data.