[Monocle] Use setRotation() & always update rotation.
[Monocle] Support per-page rotations in layout mgr.
[Monocle] Default context menu for the view.
[Monocle] PageGraphicsItem::SetLayoutManager().
[Monocle] Per-page rotations context menu.
[Monocle] Fixed GetRotatedSize().
[Monocle] Fixed layouting algorithm.