Measures to prevent new FSRS parameters from being worse than the old ones

Also, it seems that at least a few users don’t know that you have to click “Save” to apply parameters after optimization. @dae how about this: if the user presses “Optimize” and the old parameters have been replaced with the new ones, then when he tries to close the settings window without saving, a pop-up will ask him something like, “Are you sure you want to quit without saving changes?”
I thought this was already implemented based on this comment, but I’m using 23.12.1 and there is no such window.

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