[REQ] Hold modifier key to prevent deletion of archive

- [ ] List in preferences for options that can be set with a key modifier

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It would be great to be able to prevent moving a file to the Bin after extraction, by holding a modifier key (e.g. Cmd). Entropy has this feature, and it's great if you want to keep the original archive without having to change the extraction settings.

The way it would work is:
1. Hold Cmd key
2. Double-click an archive
3. Keka starts and archive is extracted (at this point user can let go of Cmd key)
4. Archive is left in place

Thanks for considering!