[Monocle] Set own pos for HighAnnItem::UpdateRect().
[Monocle] AnnManager::SelectAnnotation().
[Monocle] Pass PagesView to AnnManager.
[Monocle] AnnManager::selectAnnotation().
[Monocle] Center on selected item on external selection.
[Monocle] Select item on tree click.
[Monocle] Instantiate AnnWidget and AnnManager in DocumentTab.