Discussions: when replying to self, do not start with @self

[jordanh]

Issue - Enhancement

Sometimes I want to add more information to a comment I've entered in a discussion. Today, when I press reply the message starts with @self (where self is my username). This is annoying. I have to delete it each time so my message doesn't look silly.

Let's change this so if author === @self we don't prepend the reply with the mention

Acceptance Criteria (optional)

Users can:

• reply to themselves without @self prepended to the message

Estimated effort: 3 points (see CONTRIBUTING.md)

[jordanh]

Related neighborhood: #10222