Permission to assign case

I have attached a patch that does the following:

• Adds a new permission: "assign Cases"
• Gave the casetracker_user_options() function two arguments - the case node, and a boolean for whether or not to return all users. If the second argument is false, it returns the default assign_to, the current assign_to (from the passed $node), and the currently logged in user
• Changed the line that calls that function to casetracker_user_options($node, user_acccess('assign cases'))

Dreamweaver does weird things with whitespace so I had to run diff with the w flag, so after patching the code might need some indentation adjustment.

I like the idea here, but there are two things we need to address with the current patch

1. because casetracker_user_options() is used in the casetracker_views_handler_filter_user_options views handler we can't always assume we're using it in the context of a node. It should work also in that kind of 'filter form' context.
2. I'd like it better if the permission check was inside of casetracker_user_options(). The function should be able to tell when it needs to run the check (if we're looking at a node) and so it's better to just take care of it inside that function.

If we can address those things this should be good to go.

Rerolled/reworked against beta 4 with my SVN of Open Atrium.
(If this doesn't apply and needs to be against CVS let me know :)

I think the code has changed quite a bit since the original patch was made; in particular, I'm not sure what casetracker_user_options() used to do and does now.

This patch hides the assign options element completely (needs some fiddly stuff in the theme function, due to #691628: Don't use tables for a lists of things in forms); and if a user who doesn't see this element creates an issue it is assigned to Anonymous; if the user edits an existing one its assignee is unchanged.

Automatically closed -- issue fixed for 2 weeks with no activity.