Re-categorize notifications
Re-categorize notifications

alert->message:
edit-thank
flow-thank

Bug: T123018
Change-Id: I80b343f295eb7fc970579052b4bc00d47a0f5dac
Depends-On: I69ca536b1458b3edd59b3638a1991db0297afe2e

wikimedia/mediawiki-extensions-Thanks,wikimedia/mediawiki-extensions-Thanks,wikimedia/mediawiki-extensions-Thanks