Gmail reorders messages during MOVE from Inbox to DeltaChat

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When a batch of messages is moved from Inbox to DeltaChat folder with a single MOVE command, Gmail is known to reorder UIDs: MailCore/mailcore2#541

As a workaround, we can detect Gmail and move messages one-by-one rather than in batches.

See #3688 (comment) for discussion.

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As a workaround, we can detect Gmail and move messages one-by-one rather than in batches.

Proper solution would be to move in a batch and make use of COPYUID response to remember how exactly Gmail shuffled the messages, but this solution does not work for multi-device case. The second device will discover messages already moved to DeltaChat folder and shuffled.

We can however use COPYUID to detect that the server is shuffling messages during MOVE and enable fallback for any such server instead of hardcoding Gmail.