Fix app icon and title for yearly statistics

Signed-off-by: Sergey Starosek <sergey.starosek@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Properly handle user dive merge requests

When the user asks to merge dives in the divelist, we would always use
the "try tp find matching dive computers and merge at an offset" model.

That is incorrect if the intent is to actually merge two *identical*
dives (with different dive computers), as opposed to merging two short
dives into one longer one with a surface interval.

Normally this doesn't ever trigger (the "same dive" merging will have
been done automatically after downloading from the dive computer), but
if the dive computer times are off, and the user fixes them, and then
asks to merge dives, we should use the non-offset dive merging logic.

We already have that "likely_same_dive()" function that is used to
determine when downloaded dives get merged, so just use it for the user
merge case too.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Ensure gaslist is NULL terminated

If buffer copying is restricted by the buffer size in strncpy or
snprintf, the copied string is not NULL terminated.  Add one to the end
just to make sure.

Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Don't show tanks that aren't used during a dive

Some dive computers will always download all tanks that they store, not
just the ones used in a dive. Most people only want to see the tanks that
they actually used during the dive (and for the others there's an option
to go back to the old behavior, just in case).

All this is only in memory / during runtime. If the dive computer provided
the extra data we will not throw it away.

Fixes #373

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>