Fixes the UI refactor

Id44fea9008adb391817250c2897693f45bead717 pushed a bunch of stuff into the
subclass of LightboxInterface, but forgot to change the calls to "this" in
the dialog function to be sane.

Bug: 57678
Change-Id: I998240411b0970d43d401f739b383c0289163760
Merge "Fixes the UI refactor"