Custom functions' dates/times should update "Send at" fields (not just "Send at" button).

[Geremia]

Prerequisites

• [X] I am reporting a problem, not asking a question (for questions, go to Discussions).
• [X] I have consulted the user guide.
• [X] I have confirmed that I'm running the current version and the problem persists there (note the version number in fine print next to the add-on name on addons.thunderbird.net and compare it to the version number listed in the add-on details opened from the Add-ons page in Thunderbird; if you've got an old version, click the gear icon and select "Check for Updates").
• [X] If I'm having an issue with date-parsing confusion, I've read the section about that in the user guide and I still think this is something different.
• [X] If I'm having an issue with messages not being delivered, I've followed the troubleshooting steps in the user guide and it's still an issue.

Describe the bug

Default send-at date and time that appears in the SendLater pop-up box is always: "25/12/2023, 16:11" (or "25/12/2023" and "16:11")

How to reproduce

1. Click the "Send Later" button.
2. Observe that the default date and time is way in the past.

Expected behavior

I would expect today's date and time to be there.

Additional context

No response

Operating System

Linux

Operating System Version

Slackware

Thunderbird version

115.9.0 (64-bit)

Send Later start-up string

string still doesn't appear… SendLater v10.3.6

[jikamens]

You checked off, "I have consulted the user guide," but I am not sure you did, because the user guide explains what's probably going on here: at some point you clicked "Save these values as the defaults" button in the pop-up, perhaps accidentally. The user guide also tells you how to fix it: click "Clear defaults" in the pop-up.

[Geremia]

@jikamens Thanks.

[Geremia]

@jikamens Perhaps my "bug" here is more of a suggestion:

When I "Save these values as the defaults", I'd like:

1. my "Recur" set to my custom "function" and
2. the "Send at" fields to be updated with the same date and time that my function updates into the "Send at" button.

[jikamens]

Thanks, updated the ticket to reflect that and I will treat this as a feature request for future enhancement.