Patch fixes all roles being selected automatically

When posting the form to create a new help item, the coolaid_new_form_submit function iterates through role choices to insert roles able to access a help item. When I submit the form, even the unchecked items are in that array. As a result, the roles that were not checked are also inserted into the database, so any help item is available to anybody. This patch does a check to see if the rolekey equals the role, so only checked items are inserted as roles.