Matrix IDs are not linkifyed correctly

**Describe the bug**
Matrix IDs are not linkifyed correctly when sent in a message.
Only the server part (after the `:` char) is clickable, making it a WWW link. E.g. When I type `@notramo:grin.hu` into a message, and send it, only grin.hu is linkifyed. When other users click it, it brings them to https://grin.hu instead of my Matrix profile.

**To Reproduce**
1. Type a Matrix ID in the message composer (e.g. Alice wants to send Charlie's address to Bob)
2. Send the message
3. Only the server part (after the `:` char) is clickable, making it a WWW link
4. Bob has to copy the address and enter it to the invitation dialog instead of simply clicking on it

**Expected behavior**
When someone types in a Matrix ID, it is clickable from the message, and opens the given user's profile.