[FIX] website_forum: no limit on user post list for moderators

The limit on the list of answers and questions posted by
a given forum user is purposely limited to reduce the
performance penalty for displaying them all.
(see 78fa861936)

However seeing the full list is useful for forum moderators
(e.g. when tracking down abuse), and there are only a few
such users with high karma, so enabling it for them is
negligible performance-wise.

Fixes #3955

addons/website_forum/controllers/main.py

@@ -528,16 +528,19 @@ class WebsiteForum(http.Controller):
                     (count_user_questions and current_user.karma > forum.karma_unlink_all))):
             return request.website.render("website_forum.private_profile", values)
 
-        # displaying only the 20 most recent questions
-        user_questions = Post.browse(cr, uid, user_question_ids[:20], context=context)
+        # limit length of visible posts by default for performance reasons, except for the high
+        # karma users (not many of them, and they need it to properly moderate the forum)
+        post_display_limit = None
+        if current_user.karma < forum.karma_unlink_all:
+            post_display_limit = 20
 
+        user_questions = Post.browse(cr, uid, user_question_ids[:post_display_limit], context=context)
         user_answer_ids = Post.search(cr, uid, [
                 ('parent_id', '!=', False),
                 ('forum_id', '=', forum.id), ('create_uid', '=', user.id),
             ], order='create_date desc', context=context)
         count_user_answers = len(user_answer_ids)
-        # displaying only the 20  most recent answers
-        user_answers = Post.browse(cr, uid, user_answer_ids[:20], context=context)
+        user_answers = Post.browse(cr, uid, user_answer_ids[:post_display_limit], context=context)
 
         # showing questions which user following
         obj_ids = Followers.search(cr, SUPERUSER_ID, [('res_model', '=', 'forum.post'), ('partner_id', '=', user.partner_id.id)], context=context)