patches/ActionsTool: patch further listFilteredActionsFor to cleanup defined urls

from double slashes. This to give compatibility with definition
in actions on Web Section and Web Site portal types, for which now
absolute_url returns a trailing slash, so definitions like:

string:${object_url}/WebSection_xxx

would create a url with double slashes

product/ERP5Type/patches/ActionsTool.py

@@ -21,6 +21,7 @@ from AccessControl import ClassSecurityInfo
 from Products.CMFCore.ActionsTool import ActionsTool
 from Products.CMFCore.interfaces import IActionProvider
 from Products.CMFCore.permissions import ManagePortal
+from urlparse import urlparse, urlunparse
 
 security = ClassSecurityInfo()
 
@@ -54,8 +55,11 @@ def listFilteredActionsFor(self, object=None):
     this API should be moved to listActionInfos() of each tool so as not to
     create duplicate code paths that are sources of bugs.
 
-    Finally, this patch detects tools that are no longer action providers and
+    Also, this patch detects tools that are no longer action providers and
     invokes the migration of their actions to portal_actions
+
+    Finally, this patch normalised the url defined in actions, in the case they
+    have double slashes
     """
     actions = []
 
@@ -88,7 +92,14 @@ def listFilteredActionsFor(self, object=None):
                       }
 
     for action in actions:
-        filtered_actions.setdefault(action['category'], []).append(action)
+      # normalise the url defined in actions, in the case they
+      # have double slashes
+      url = action.get('url')
+      if isinstance(url, str):
+        parsed_list = list(urlparse(url))
+        parsed_list[2] = parsed_list[2].replace('//', '/')
+        action['url'] = urlunparse(parsed_list)
+      filtered_actions.setdefault(action['category'], []).append(action)
 
     return filtered_actions