Username autosuggest is adding incorrectly \ when username has underscores _
Description of the problem
To reproduce just type any user that has underscores, as an example: @__rachid and you will get:
as you accept the suggestion.
Which Group/Project (with full path) is experiencing the issue?
Approximate date/time when the error occurred.
Every day since 2 members of the Team use underscores in their usernames
Please fix it. It looks like an easy Front-end thing to solve and it's very annoying!