[Tim Wood]

We originally had the search string persist more than it did now, and we are backing off of that over time. The goal was to avoid the behavior Mail has where you enter a search in the toolbar and then switch folders, realizing that you filed the message somewhere else, and it clear the search. You then have to type it in again which is annoying.

It could still be useful for someone to save a perspective with a search string in place, though maybe that isn't worth the confusion this causes on occasion.

We have an existing bug for this issue, <bug://bugs/43038> (Don't persist search tool contents through restart), and I've attached this thread to the bug.