* Create new help page for comment template context variables

( see /help/context/; also linked from comment form)
* Refactor API help page to share template with context help
* Allow a limited number of Ticket & Queue model fields to be 
  accessible in comments, as per 'Help' page.
* New function in lib.py to build a dict of 'safe' fields from 
  ticket & queue, to prevent the power of the Django model API 
  from exposing things like passwords (imagine if a user typed
  a comment containing {{ ticket.queue.email_box_password }} !!!!
* When accessing the ticket list with no filter params (eg by 
  clicking on the "Tickets" button in the menu), the default 
  search is for tickets that aren't closed, rather than showing
  all tickets.
* Updated English locale with changed message strings.

views/staff.py

@@ -21,7 +21,7 @@ from django.template import loader, Context, RequestContext
 from django.utils.translation import ugettext as _
 
 from helpdesk.forms import TicketForm
-from helpdesk.lib import send_templated_mail, line_chart, bar_chart, query_to_dict, apply_query
+from helpdesk.lib import send_templated_mail, line_chart, bar_chart, query_to_dict, apply_query, safe_template_context
 from helpdesk.models import Ticket, Queue, FollowUp, TicketChange, PreSetReply, Attachment, SavedSearch
 
 
@@ -133,6 +133,12 @@ def update_ticket(request, ticket_id):
     owner = int(request.POST.get('owner', None))
     priority = int(request.POST.get('priority', ticket.priority))
 
+    # We need to allow the 'ticket' and 'queue' contexts to be applied to the
+    # comment.
+    from django.template import loader, Context
+    context = Context(safe_template_context(ticket))
+    comment = loader.get_template_from_string(comment).render(context)
+
     if not owner and ticket.assigned_to:
         owner = ticket.assigned_to.id
 
@@ -284,6 +290,8 @@ def ticket_list(request):
         'other_filter': None,
         }
 
+    from_saved_query = False
+
     if request.GET.get('saved_query', None):
         from_saved_query = True
         try:
@@ -295,8 +303,21 @@ def ticket_list(request):
 
         import base64, cPickle
         query_params = cPickle.loads(base64.urlsafe_b64decode(str(saved_query.query)))
+    elif not (  request.GET.has_key('queue')
+            or  request.GET.has_key('assigned_to')
+            or  request.GET.has_key('status')
+            or  request.GET.has_key('q')
+            or  request.GET.has_key('sort') ):
+
+        # Fall-back if no querying is being done, force the list to only 
+        # show open/reopened/resolved (not closed) cases sorted by creation
+        # date.
+
+        query_params = {
+            'filtering': {'status__in': [1, 2, 3]},
+            'sorting': 'created',
+        }
     else:
-        from_saved_query = False
         queues = request.GET.getlist('queue')
         if queues:
             queues = [int(q) for q in queues]