Fixes and Additions

• Fix surgery outro giving errors if the default description is empty (fixes #4283 (closed))
• Allow duplicating rules (closes #4285 (closed))
• fix importing an existing rule having clashing IDs (see #4285 (closed))
• Add toggle for default RA conditions mode (closes #4223 (closed))
• Fix muscle target not correctly reporting used rule (see #4271 (closed))
• Fix dietPill message giving error when diet set by "Fix fat and skinny slaves" (fixes #4271 (closed))