Enhancement: Update Mailchimp on single Member Edit page saves

[dwanjuki]

Is your feature request related to a problem? Please describe.
Updating a member's details (e.g. Expiration Date, User Fields, e.t.c) via the PMPro 3.0 Member Edit admin pages does not send the updated data to Mailchimp merge fields.

In 2.x, membership fields were included on the User Profile page and the data would be sent if Update on Profile Save was set to Yes.

Describe the solution you'd like
A way to update Mailchimp when edits are made via the Member Edit admin pages

Additional context
Mods: #566863

Workaround
After making changes to a member navigate to their WP User Profile page and click on Update Profile.

[dwanjuki]

Another customer ran into this issue, requested a hook
Mods #578865

[thomasfromwood]

Yes as explained it will be very useful when users are modified or added by admin. Another idea is to sync all members every day or something like that with cron.