While trying to understand more of the big change from PR 1528,
I found that the divelist was marked changed while it was not
changed at all. Reason is simple. The MODIFY_DIVES code assumes
its called only for truly changed data. But in case of saving
tagged strings, it was not.
This fixes this. And I do not believe this has any visual effects.
Further, the now broken indentation is fixed seperately.
Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>