Undo: make undo-system dive site-aware

As opposed to dive trips, dive sites were always directly added
to the global table, even on import. Instead, parse the divesites
into a distinct table and merge them on import.

Currently, this does not do any merging of dive sites, i.e. dive
sites are considered as either equal or different. Nevertheless,
merging of data should be rather easy to implement and simply
follow the code of the dive merging.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

0 files changed, 0 insertions, 0 deletions