On high res displays we end up using
the tile manager on single pages, that doesn't work
(for reasons that aren't yet clear) - but it
doesn't make sense if we need the whole thing anyway.
Pass the normalizedRectangle to show we need the whole
page (which fixes *some* of the issues by itself),
and then don't bother using tileManager if we're
using most of the page anyway.
BUG: 401339