Misc UI capitalisation consitencies and other text changes

Capitalisation consitencies
A typo correction
A readability improvement (IMHO)

Signed-off-by: Tim Wootton <tim@tee-jay.demon.co.uk>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
dive list context menu capitalisation

Signed-off-by: Tim Wootton <tim@tee-jay.demon.co.uk>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
profile capitalisation

Signed-off-by: Tim Wootton <tim@tee-jay.demon.co.uk>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
"non-used" just didn't sound right to me.

Signed-off-by: Tim Wootton <tim@tee-jay.demon.co.uk>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Add image support to UDDF export

This patch adds image support to UDDF export. As far as I can tell from
the UDDF specification, the images can only be added to notes field, so
that is what we do here. (buddy and owner can also have image tags, but
that is irrelevant for Subsurface currently.)

Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Add support for decimal comma on UDDF import

Gas changes generated by Xdeep can contain mix information with decimal
comma instead of decimal point. Thus we need to convert the comma to
point before performing mathematical operations on it.

Fixes #612

Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>