More or less did a complete rewrite of the plugin, replaced the use of tracker name by use of tracker ID for permission flags
Added a patch to RolesController for translating and displaying names in the Permissions screen
Revamped the IssuesController patch so that now it rejects invalid trackers properly on edit/update/create (it will revert to default behavior if module is disabled, tracker ID parameter not specified in update, or identical to previous value)
Removed the javascript bit since it didn't prevent direct updates