Fix HTML errors

- There needs to be a space between HTML attributes.
- Ampersand must be encoded on URL addresses
- Div element is non-void, so it cannot be self closed

Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Preferences: Change of text for unused cylinders.

The present text for configuring the display of unused cylinders simply reads:
"unused cylinders". This is now changed to "Show non-used cylinders in
Equipment Tab". The latter wording is much clearer to the average user.

Signed-off-by: Willem Ferguson <willemferguson@zoology.up.ac.za>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Update to bring user manual in line for the release of V4.1.

1. New section added on IrDA and communicating with the Uwatec Galileo dive computers.
2. Sections 7 to 9 of manual updated to reflect current version. Three figures updated.
3. New section added to reflect the dive planner. This is only a skeleton
awaiting better description when the dive planner is more mature. Added
2 figures within this new section.

Signed-off-by: Willem Ferguson <willemferguson@zoology.up.ac.za>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Use the ENABLE_PLANNER macro in the manual too

This introduces ifdef control structures in the manual too, so we can
continue to develop both the planner and its manual, until its ready for
release.

Signed-off-by: Anton Lundin <glance@acc.umu.se>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Fix incorrect behavior in preference window

When doing some changes in the preference window and clicking "Apply", the
'Close without saving' button is supposed to restore the previous values.
However some fields were not restored correctly.

- The Animations Slider was never restored to its initial value.
  (A new member in the pref struct was added - pref.animation)

- The 'Font' and 'Font size' were restored correctly to the previous
  values but their effects weren't restored to the UI and that required to
  open the prefrences window again and press ok.

Fixes #481

Signed-off-by: Gehad elrobey <gehadelrobey@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>