[Pidgin] Batch modify: #4061, #16239, #16240, #16241, #16242, #16243, ...

[Pidgin]

Batch modification to #4061, #16239, #16240, #16241, #16242, #16243, #16244, #16245, #16246, #16984, #17012 by grim:
milestone to 2.12.1

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