Fix a bug with swap_when_safe, and experimentally default

chunks_autopickup, swap_when_safe, and show_beam to true.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5457 c06c8d41-db1a-0410-9941-cceddc491573

Created by  j-p-e-g  on June 3, 2008
VIHJ3Z75JN7BXWNOPWV3CWQZEA7K5DK36EKHCYMZC7SOSJYH2XHQC
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