Apply makes a touch_artifact check on the tool being applied, but
autounlock would pick an unlocking tool to use without doing that.
Noticed while fixing that: autounlock took no time.
Since picking an artifact unlocking tool might now blast the hero,
change the tool selection. First choice: any key except another
role's quest artifact; second: any lock-pick except another role's
quest artifact; third: any credit card except another role's quest
artifact; fourth, fifth, sixth: other roles' quest artifact key,
lock-pick, or credit card. The fifth category (artifact lock-picks)
is empty. Rogues will pick non-cursed Master Key over any other
key (special case for first choice). Tourists will pick a key or
a lock-pick over their PYEC (first and second choices over third).
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