VE-1712: Execute Venus infobox logic on 'wikipage.content' hook

https://wikia-inc.atlassian.net/browse/VE-1712
VE-1712: Subscribe to postEdit hook instead of wikipage.content

This change is needed because infobox logic depends on particular elements measurements (infobox) for which element has to be inserted in the DOM.
Merge pull request #5591 from Wikia/VE-1712

VE-1712: Execute Venus infobox logic on 'wikipage.content' hook