Batch Add: Hide already added pics.

[Goochi]

This feature is already the case in the cpgnuke version of coppermine 1.3.0

Why still showing pictures that are already in the database in the 'Batch Add Pictures' .
Hiding would be so much better.

Or you could make it an option wether or not to hide them.

[Casper]

This has been asked for many times.  There are good reasons we cannot do that.