Fixed several problems in the Sequence Editor that were manifested when editing conditional slots:
For some conditionals, if you accepted the default value in the pulldown menu, the argument value wasn't stored correctly.
When editing a "Skill is/not ready" or "Skill is/not trained" conditional, the list of skills in the pulldown menu contained duplicate entries in some circumstances (described by fade2gray above).
The "Skill not ready" condition didn't actually test skill readiness; instead it tested whether a skill was trained (i.e. it implemented the "Skill not trained" condition).
The "Skill trained" condition didn't actually whether the skill was trained; instead it tested whether a skill was ready (i.e. it implemented the "Skill ready" condition).
Other changes:
When editing a "Skill is/not ready" conditional in the Sequence Editor, untrained skills will no longer be shown in the list.