QtMainWindow: unify render plugins

RenderPlugin::RenderTypes has new values
Plugins determine where they should belong in the View menu
QtMainWindow does not need :
	- to handle Crosshairs as a special plugin
	- to handle Atmosphere plugin and options as a special case

REVIEW: 108616
marble_part: fix renderplugin type
implement CelestialBodiesSortFilterProxyModel in its own file
declarative RoutingProfilesModel
wip