Allow option to undo "show all images from this sender"

Feature Suggestions
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#1

The Problem

I mistakenly clicked on Always show all images from this sender .

Proposed Solution

It’d be nice to have an option that allows you to undo the white-listing of specific senders.

(Originally posted by harshitgarg22 on GitHub.)

#2

Nearly five years later, it would still be great to have this feature. Or, a suggestion for a workaround.