slapos_panel: display the web message attachments in the thread reader

master/bt5/slapos_panel/SkinTemplateItem/portal_skins/slapos_panel/DiscussionPost_getAttachmentList.py

+result = []
+# Copied from EmailDocument_viewAttachmentListRenderer
+for information in context.getAttachmentInformationList():
+  if information['uid'] != information['filename']:
+    result.append({
+      'title': information['filename'] or information['uid'],
+      'content_type': information['content_type'],
+      'url': '%s/getAttachmentData?index:int=%s' % (context.absolute_url(), information['index'])
+    })
+return result

master/bt5/slapos_panel/SkinTemplateItem/portal_skins/slapos_panel/DiscussionPost_getAttachmentList.xml

+<?xml version="1.0"?>
+<ZopeData>
+  <record id="1" aka="AAAAAAAAAAE=">
+    <pickle>
+      <global name="PythonScript" module="Products.PythonScripts.PythonScript"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>_bind_names</string> </key>
+            <value>
+              <object>
+                <klass>
+                  <global name="_reconstructor" module="copy_reg"/>
+                </klass>
+                <tuple>
+                  <global name="NameAssignments" module="Shared.DC.Scripts.Bindings"/>
+                  <global name="object" module="__builtin__"/>
+                  <none/>
+                </tuple>
+                <state>
+                  <dictionary>
+                    <item>
+                        <key> <string>_asgns</string> </key>
+                        <value>
+                          <dictionary>
+                            <item>
+                                <key> <string>name_container</string> </key>
+                                <value> <string>container</string> </value>
+                            </item>
+                            <item>
+                                <key> <string>name_context</string> </key>
+                                <value> <string>context</string> </value>
+                            </item>
+                            <item>
+                                <key> <string>name_m_self</string> </key>
+                                <value> <string>script</string> </value>
+                            </item>
+                            <item>
+                                <key> <string>name_subpath</string> </key>
+                                <value> <string>traverse_subpath</string> </value>
+                            </item>
+                          </dictionary>
+                        </value>
+                    </item>
+                  </dictionary>
+                </state>
+              </object>
+            </value>
+        </item>
+        <item>
+            <key> <string>_params</string> </key>
+            <value> <string></string> </value>
+        </item>
+        <item>
+            <key> <string>id</string> </key>
+            <value> <string>DiscussionPost_getAttachmentList</string> </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
+</ZopeData>