Provide and use an acronym_lower() method so sorting works as expected.

- Legacy-Id: 540

ietf/proceedings/models.py

@@ -22,6 +22,8 @@ class ResolveAcronym(object):
 	if interim:
 	    return "i" + acronym
 	return acronym
+    def acronym_lower(self):
+        return self.acronym().lower()
     def acronym_name(self):
         try:
             interim = self.interim

ietf/templates/meeting/list.html

@@ -67,7 +67,7 @@ Updated as of {% now "F j, Y, P (T)" %}
       </td>
     </tr>
   </table>
-{% for wg in irtf_list|dictsort:"acronym" %}
+{% for wg in irtf_list|dictsort:"acronym_lower" %}
     <table cellpadding="0" cellspacing="0" border="2" width="80%">
       <tr><a name="wg-{{ wg.acronym }}"></a>
         <td align="center" bgcolor="#DDFFDD" width="20%"><b>{{ wg.acronym|upper }}</b><br>