Switching to/from msw/fsw with a dive planned leaves the last stop and step wrong.

[eskil]

If you have a dive plan set, and you change the units being used, the conversion leaves the number is a slightly off state due to rounding.

Ie. a plan for 160fsw with last stop at 20fsw and interval of 10fsw. If changed to msw will yield a dive to 51msw but with a last stop of 6.14msw and a step interval of 3.07msw.

Hence a decogas such as 100% at 20fsw becomes 100% at 6msw, but wont be picked at the last stop since 6msw < 6.14msw...

Luckily this generates a plan that is obviously suspicious since all deco gas switches are off by 1 stop. And if you start a clean plan with the unit system chosen, everything will be right.

And of course ditto if switching from msw to fsw with a plan already set.

[eskil]

I'll aim for displaying a warning to user if the unit system is being changed and there's a dive plan in place. And if the user ok's the change, make sure all the numbers are converted to the expected equivalents.

[eskil]

Fixed in change 720, 721, 722 and 732.