StandbyThread: add method LockTrigger()
WindowProjection: don't use DebugFlag due to runtime overhead
WindowProjection: rename screenbounds_latlon to screen_bounds
WindowProjection: use Point2D<unsigned> for screen size
TopographyStore: add TopographyFile reference variables
GlueMapWindow: use MapWindow::SetLocation()

.. instead of Projection::SetGeoLocation().
zlib: upgrade to upstream version 1.2.8
use pressure altitude instead of gps if available