UDDF

[Dirk Hohndel]

So much fun. Thanks for all the work on getting Subsurface compliant
there. I think we need to add a dialog with a progress bar. It takes a
LONG time to save my 350 or so dives to UDDF (about 28 seconds on what
looks to the VM like a dual core Haswell i5). That's a bit too long for no
user feedback and actually a visual that looks like something is broken
(as the main screen isn't redrawn). It would be nice to have this in a
thread and do a progress UI.

After 4.3 :-)

/D