North-up viewing of high-orbit objects

`DynamicObjectView.js` already knows how to auto-select East-North-Up or VVLH for different objects based on their fixed-frame velocity.  This pull adds some logic to introduce a "North-Up" view for high objects like GEO and Molniya spacecraft, and passing asteroids.  The new view shows the Earth "rightside-up" (with the North Pole oriented towards the top of the screen) behind the tracked object.  This new view is automatically selected in a manner partially inspired by camera mechanics in the game Kerbal Space Program.