Integrated selection of bailout in the diluent selection page: To be able to introduce a new menu page for future development, the selection of bailout cases is now combined with the selection of the diluent at one page. To enable this the concept of a "shadow page" has been introduced. With that the original functionality may be reused without need to a a standalone page. The bailout /diluen page is now switched (surface mode) using the last menu line of the gas selection page

Heinrichs Weikamp OSTC4 update files.

The builds are for testing purposes only. Be careful, they might not work and are definitely not recommended for real dives.