Allow for combined Sort by "Threaded" and "Grouped by Sort"

[spap]

I usually sort my emails by "Date" and I love the threaded view, since it allows me to easily keep track of conversations.

A small productivity boost in my opinion: I would find it very helpful to be able to select Sort by "Threaded" and "Grouped by Sort" at the same time. This option would essentially need to pull an entire thread and place it under the correct sorting category each time a new email arrives. For example, (given how I sort emails) if Sort by "Date" is active and a new email arrives in conversation, the whole thread is moved under the category "Today".

[Jon]

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