[PATCH] Provide photos summary on dive list (Part 2)

[Willem Ferguson]

Subject:  [PATCH] Provide photos summary on dive list (Part 2)

Please apply this patch on top of the previous patch with the same title.
1) Provide icons with white margin to look more like photos
2) Optimise code, following Robert's suggestions.
3) Column heading for photos column is now: Photos. This takes up extra
    horizontal space but makes the user interface more understandable.

Signed-off-by: Willem Ferguson <willemferguson at zoology.up.ac.za>

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