Currently, in the dynamic menu for actions (on a reply, in a topic):
- some actions have: icon + full text (e.g. "Reply")
- some actions have: only an icon, with a tooltip when the mouse hover it ("Downvote", "Upvote")
But the flag action has no tooltip, and the user must have the "courage" to click it to discover what it is for.
It would be more logical to add also a tooltip for that button like "Flag the message" or something explaining the result of the click before performing it ;-)