Save breakpoints?

I sometimes wish we had an option to do this, with a prompt for optional save on un-saved exit.

If debugging is becoming very complex, and if I have to leave what I'm doing and come back to it later, it can take quite a while to rebuild my debugging thought processes and re-establish wht seem to be the best positions for breakpoints.

Better still, would be if breakpoints were saved immediately they were set or un-set (or stashed away in the registry or 'Appdata').
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John