fix(lightbox): lightbox wasn't shown when generated from ajax view.

It also fixes page owner in core/edit_comment ajax view, needed for a consistent
experience with embed plugin.

Fixes #6304
fix(lightbox): Correctly applies color box options on each element

Whatever colorbox options were on the data- attribute of the first element
get copied to all the other elements. This fixes that.

Fixes #6107
Merge pull request #3 from mrclay/sembrestels-embed-editing-comment

fix(lightbox): Correctly applies color box options on each element
Merge pull request #6378 from sembrestels/embed-editing-comment

fix(lightbox): lightbox wasn't shown when generated from ajax view.