Mouse review: Ensure we compare the top level document with the active one
Mouse review: Ensure we compare the top level document with the active one

Otherwise mouse review can fail in embedded documents such as the one
that pops up to display Google apps on google.com.

Thanks to Colomban Wendling for debugging this!

GNOME/orca,GNOME/orca,GNOME/orca,GNOME/orca