Berthold Stoeger abf9650280 cleanup: don't keep pointer-to-picture in PictureEntry
The DivePictureModel kept a pointer to picture for each entry.
Firstly, this is dangerous from a data-consistency point of view.
Secondly, the entry wasn't even used anywhere. Remove it.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
2020-04-11 18:50:53 +02:00
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