1) Add an extra column to dive list, just left of Locality field.
2) For each dive, give summary of photos as follows:
i) no photos: no icon in that column
ii) photos taken during dive: show icon of fish
iii) photos taken before/after dive: show icon of sun
iv) photos taken during as well as before/after dive: show
icon with both fish and sun
3) Provide information for the sort operation to work on
this column of the dive list.
Signed-off-by: Willem Ferguson <willemferguson@zoology.up.ac.za>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
