Add functions to open park window to awards/rating

Also update replace some address that have constants/functions
Add news_item_open_subject()
Add function to open park window to guests tab
Change NEWS_ITEM_SCENERY to NEWS_ITEM_RESEARCH
Added get_guest_face_sprite small and large functions.
another typo fixed :)
Cleaning up files and code related to windows
Moved platform specific UI code (MessageBox, DirectoryChooser) into osinterface.c
Implement update for ride favourited numbers