Resolves: #i125055# follow-up of fix for #i124338#

adjust condition to trigger sort of bookmarks in order to avoid serious
performance decrease

Kudos to Ariel for his analysis

(cherry picked from commit 6895a55d74fe6a3b70ba15f77050652d3afee821)

Change-Id: Ic72b0a07556ec85a6ee2568f814b8bcfaaabe42e