Use typeahead when adding users to a team

[eotchi]

Improve the usability of adding a user to a team.
Typeahead or similar (*) should be introduced so to suggest a list of valid users matching the current input of the user.

(*) https://twitter.github.io/typeahead.js/examples/

[flavio]

On issue #103 @mssola proposed the usage of chosen.

What do you (@mssola) think about typeahead?

[mssola]

@flavio I have no preference between any of the proposed solutions. Chosen was the one that @cyntss suggested me. So... I don't know :D

[flavio]

I'll let you and @cyntss figure out what to use. I have no preference either.

[brycereitano]

I was thinking about his feature, but should a non-admin be able to see a list of users? The type-ahead would expose that.

A solution to this, is a non-admin doesn't get the typeahead where the admins would. Otherwise we just expose a list of users to any of the users.

[flavio]

Yes that's true, but I don't see that as a big security issue. Do you? Sites like github are doing the same thing; also organizations have already shared addressbooks containing this information...

[brycereitano]

I do not, but I thought I would bring it up.

Would you mind if I pick up this issue?

[flavio]

Sure, go ahead! :)

[mssola]

Note that this also should apply to team names in the "Create namespace" form inside of the namespaces page.