Move conversion cuft <-> liter from desktop-widget/diveplanner.cpp
to plannerShared, to facilitate the same results in mobile
diveplanner
Use Backend for bottomsac/decosac and update to check
for switch LITER <-> CUFT
Add bottomsac/decosac to QMLinterface.
Signed-off-by: jan Iversen <jan@casacondor.com>
cd3c2266f9