[PATCH 4/6] Add support for libdivecomputer DC_FIELD_DIVEMODE

[Dirk Hohndel]

Thanks for that series!

Now I need to find the time to remove our custom Cobalt code and replace
it with calls to libdivecomputer's newly found support for tank sizes.

Sadly I don't have access to a Cobalt (I had a loaner for a while which is
what I used when I developed the code that's currently in Subsurface -
back then Jef didn't want that added to libdivecomputer and I'm thrilled
it's now there...

Does anyone here have a Cobalt so we can test this once I implemented it?
Or does anyone feel like implementing it? :-)

/D