Removes the hack for older versions Chrome that fixed unclickable :before since it's causing other issues.
Adds figcaption to previewable RTE enhancements.
Adds preview image caption to $.objectId select box.
Changes @color-alert-lighter to be more faint pink.
Makes sure that :hover on .input maintains the white background color.
Fixes error on publish when the content changes its type.
Adds ExternalContent#getOrCreateDocument so that the jsoup document can be reused.