claws-mail: update to 3.16.0.
claws-mail: update to 3.16.0.

Closes: #10081 [via git-merge-pr]

necrophcodr/void-packages,coredumb/void-packages,NeoChontrix/void-packages,coredumb/void-packages,floGik/void-packages,necrophcodr/void-packages,NeoChontrix/void-packages,NeoChontrix/void-packages,NeoChontrix/void-packages,necrophcodr/void-packages,floGik/void-packages,floGik/void-packages,coredumb/void-packages,coredumb/void-packages,NeoChontrix/void-packages,NeoChontrix/void-packages,floGik/void-packages,coredumb/void-packages,floGik/void-packages,coredumb/void-packages,necrophcodr/void-packages,floGik/void-packages,necrophcodr/void-packages