workflow: fix "Possible Transitions" columns on State tab

 * fix typo in column name
 * add editable field for correct display

bt5/erp5_workflow/SkinTemplateItem/portal_skins/erp5_workflow/Workflow_viewStateList.xml

@@ -80,6 +80,7 @@
                     <value>
                       <list>
                         <string>listbox_title</string>
+                        <string>listbox_destination_title_list</string>
                       </list>
                     </value>
                 </item>

bt5/erp5_workflow/SkinTemplateItem/portal_skins/erp5_workflow/Workflow_viewStateList/listbox.xml

@@ -90,7 +90,7 @@
                         </tuple>
                         <tuple>
                           <string>destination_title_list</string>
-                          <string>Possibles Transition</string>
+                          <string>Possible Transitions</string>
                         </tuple>
                         <tuple>
                           <string>description</string>

bt5/erp5_workflow/SkinTemplateItem/portal_skins/erp5_workflow/Workflow_viewStateList/listbox_destination_title_list.xml

+<?xml version="1.0"?>
+<ZopeData>
+  <record id="1" aka="AAAAAAAAAAE=">
+    <pickle>
+      <global name="ProxyField" module="Products.ERP5Form.ProxyField"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>delegated_list</string> </key>
+            <value>
+              <list>
+                <string>editable</string>
+                <string>title</string>
+              </list>
+            </value>
+        </item>
+        <item>
+            <key> <string>id</string> </key>
+            <value> <string>listbox_destination_title_list</string> </value>
+        </item>
+        <item>
+            <key> <string>message_values</string> </key>
+            <value>
+              <dictionary>
+                <item>
+                    <key> <string>external_validator_failed</string> </key>
+                    <value> <string>The input failed the external validator.</string> </value>
+                </item>
+              </dictionary>
+            </value>
+        </item>
+        <item>
+            <key> <string>overrides</string> </key>
+            <value>
+              <dictionary>
+                <item>
+                    <key> <string>field_id</string> </key>
+                    <value> <string></string> </value>
+                </item>
+                <item>
+                    <key> <string>form_id</string> </key>
+                    <value> <string></string> </value>
+                </item>
+              </dictionary>
+            </value>
+        </item>
+        <item>
+            <key> <string>tales</string> </key>
+            <value>
+              <dictionary>
+                <item>
+                    <key> <string>field_id</string> </key>
+                    <value> <string></string> </value>
+                </item>
+                <item>
+                    <key> <string>form_id</string> </key>
+                    <value> <string></string> </value>
+                </item>
+              </dictionary>
+            </value>
+        </item>
+        <item>
+            <key> <string>values</string> </key>
+            <value>
+              <dictionary>
+                <item>
+                    <key> <string>editable</string> </key>
+                    <value> <int>0</int> </value>
+                </item>
+                <item>
+                    <key> <string>field_id</string> </key>
+                    <value> <string>my_lines_field</string> </value>
+                </item>
+                <item>
+                    <key> <string>form_id</string> </key>
+                    <value> <string>Base_viewFieldLibrary</string> </value>
+                </item>
+                <item>
+                    <key> <string>title</string> </key>
+                    <value> <string>Possible Transitions</string> </value>
+                </item>
+              </dictionary>
+            </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
+</ZopeData>