Comment 67 for bug 1653351

I should think we need to understand the use case rather than simply accept the proposed implementation at face value. Users want to signify for a message not to be auto selected on threadpane context/cycler column actions that remove a previous message. A global pref or even folder property is certainly the wrong way to go about this, as sometimes messages should be auto selected, and sometime not (as in a trash folder restoring or junking/deleting messages), and the same behavior is not necessarily consistently desired in the same folder at all times. So changing such a pref or property is very non ergonomic and imo such an implementation is a nonstarter.

The patch does not intend to change existing behavior at all when a message is selected, for either message window actions or the imap delete model or anything else. However, deselecting (ctrl-left click) a message is the method used to indicate the user does not want subsequent auto selection to happen. It's the best way to finely tune the behavior with 1 click.

I hope this makes the patch's intent clearer.