WP Gallery Click SiteCatalyst Functions

Using pmc.keyCTAClick function, we can set clicks on WP Gallery pages.
Merge commit '13f62ab880cd88c4f4177a34fcb320b91cf75381' into microsoft-master
merge commit for m.kim
Merge branch 'microsoft-master' of https://github.com/robpointmarc/pointmarc-public into microsoft-master