ContentPageShare#show text doesn't match stream text

[drusepth]

Expected behavior

The stream display shows the associated page ("[User] added [Page] to a collection")

Actual behavior

Viewing the share directly does not show the associated page; it just shows "[User] said:". This can be confusing if, for example, the user comments about their associated page and links the share to someone, who might think the comment is about the collection instead.