Feature Request: Add option to clear history on exit

[Former user]

Originally reported on Google Code with ID 284 ``` Please add a user preference that be enabled/disabled to clear the history on exit. Perhaps a new item under Settings > Behavior > Clear history on exit. ```

Reported by `[e-mail]` on 2009-05-03 01:33:04

[Former user]

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Reported by `helder.pereira.correia` on 2009-05-03 15:23:03 - Status changed: `Duplicate` - Merged into: #191