Feature request: Synchronization + Personal Data in public computers

First of all hi and congratulations to the dev team for what they have accomplished with Kestrel. I really love all the new features.
There is one thing that is bothering me though and IMHO it could be improved.
I think it would be really useful, especially when using public computers to have 2 checkboxes on the "Synchronize Opera" tab.
The first could be something like "stop synchronization once Opera is closed" and the other one could be "Erase all synchronization changes made, after Opera is closed".
The first one serves the purpose of not getting changes to one's bookmarks etc if he leaves the computer and someone else starts using it, and the other could be used if someone didn't want to have his bookmarks stored in the public computer, so that others could see/access them, after he left.

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