Introduce two DiveListNotifier signals which are sent by
the undo commands if dives are added to / removed from the
core.
The signal has the dive site and the index in the global
dive site table as payload. Thus, the model has only to
remove the appropriate rows.
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
dive- and trip-table functions are generated in dive.c by macros.
Move this macros to a new "core/table.h" header file.
Thus, these functions can be used for other tables (e.g. dive site)
and the trip function can be moved to a separate translation unit
(divelist.c being quite large already).
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
