INTEG-228: [PLF40-Migration] Incorrect Wiki Activity

Problem analysis:
* On Platform 3.5, each action of creation or update (not minor edit) will add an item on Activity Stream.
  The version information displays only in View change link of such activities.

Fix description:
* Update the condition to display View change link in case of page update.
* Extract the value of WIKI_PAGE_REVISION from the View change link.