Multidrop screen now shows a summary of what is about to be dropped

Wielded items are highlighted in lightblue, and worn items are highlighted in cyan.
Partial quantities are shown with { } braces.
Redraw not optimized; does not interfere with 80 column display on Windows.
![2013 06 06](https://f.cloud.github.com/assets/1221610/619872/ec970b0e-ced7-11e2-8f57-f93a2dc08ee1.png)

Signed-off-by: D Lue Choy <dluechoy@>