Added snooze functionnality to imap

[josaphatim]

With this merge request users can waiten emails by picking a desired date, or with some predefined helpers (later on the day, tomorrow, next weekend, next week on monday, or the first of next month). Snoozed messages go to Snoozed folder. All snoozed emails (with X-Snoozed header) and all emails in snoozed folder can be unsnoozed manually. Automatic unsnoozed is for now done by a script that runs every minute to unsnooze email which dates are reached.

It fixes #572
And relates https://avan.tech/item59012

[dumblob]

I did not test this but from the source there seem to be no obvious mistakes.

I wonder how this behaves if one wants to edit a snoozed/scheduled email? Especially I am curious what happens if the snooze fires/triggers (in the background) during editing together with a combination of:

1. pressing plain "send"
2. pressing "snooze"
3. pressing "unsnooze"

All these tricky situations must be visually clearly communicated (e.g. a life countdown) in the UI.

Could you take a look at these and maybe others I missed?

[josaphatim]

I did not test this but from the source there seem to be no obvious mistakes.

I wonder how this behaves if one wants to edit a snoozed/scheduled email? Especially I am curious what happens if the snooze fires/triggers (in the background) during editing together with a combination of:

1. pressing plain "send"
2. pressing "snooze"
3. pressing "unsnooze"

All these tricky situations must be visually clearly communicated (e.g. a life countdown) in the UI.

Could you take a look at these and maybe others I missed?

Well noted. I will work on. Thanks

[marclaporte]

Related: Progress: https://datatracker.ietf.org/doc/draft-ietf-extra-sieve-snooze/

[josaphatim]

I did not test this but from the source there seem to be no obvious mistakes.

I wonder how this behaves if one wants to edit a snoozed/scheduled email? Especially I am curious what happens if the snooze fires/triggers (in the background) during editing together with a combination of:

1. pressing plain "send"
2. pressing "snooze"
3. pressing "unsnooze"

All these tricky situations must be visually clearly communicated (e.g. a life countdown) in the UI.

Could you take a look at these and maybe others I missed?

[josaphatim]

Changes made to merge request

[josaphatim]

@kroky I made changes.