metomi/rose#680: latent page info for rose edit
metomi/rose#677: speed up group ignore
metomi/rose#677: rose edit: speed up group remove sections
metomi/rose#677: rose edit: correct opposite-valued ignore boolean
metomi/rose#680: changes following review
Merge pull request #833 from benfitzpatrick/680.rose-edit-latent-page-info

#680: rose edit - more latent page info
Merge pull request #834 from benfitzpatrick/677.rose-edit-speedup-section-ops

#677: speedup section ops in rose edit