Apply the gas mode immediately.
Apply the gas mode immediately.

Because the gas mode takes precedence over the individual gas mix
definitions, we can simplify the code by taking the gas mode into
account immediately when parsing the gas mixes.

josh-wambua/libdivecomputer,venkateshshukla/libdivecomputer,henrik242/libdivecomputer,josh-wambua/libdivecomputer,henrik242/libdivecomputer,glance-/libdivecomputer,venkateshshukla/libdivecomputer,Poltsi/libdivecomputer-vms,glance-/libdivecomputer