Berthold Stoeger ec586d0e0a Filter: replace checked-state by struct
In the future, we might be smarter about the dive-counts and calculate
them only once and incrementally (if e.g. new dives are added).
Prepare for more complex caching by turning the checked boolean into
a struct, which can then be extended by a count and other things
(e.g. the name).

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
2018-08-28 05:03:59 -07:00
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