Allow livechat managers to transfer chats

[drallgood]

@RocketChat/core

This PR allows livechat managers to transfer chats. Right now, only the active agent is allowed to do that.
Sometimes, those people forget to forward it and just leave it open and it's easier for the manager to simply forward it to someone else than having to ask the active agent to do it.

[sampaiodiego]

hey, thanks for this pull request.

currently the dropbox to forward to an user is filtering the current user (as you can see here), so I think we need to change it to not show the current agent, what you think?

[drallgood]

@sampaiodiego hmm... yeah, I think hat might make sense. This way the manager could forward it to himself if needed.

[drallgood]

@sampaiodiego Any pointers how I can get the currently assigned agent?
So far I haven't been able to access that information in visitorForward.js
It's completely unclear to me, how information flows in this area. Somehow data just shows up???

[sampaiodiego]

@drallgood oh, looks like we don't have that information on client side 😞

maybe we can merge this as is and improve it after.. is that ok?

[drallgood]

@sampaiodiego Sure :)

[engelgabriel]

@sampaiodiego is this approved?

[drallgood]

@sampaiodiego
Just noticed that this still hasn't been merged and thus wasn't included in the latest release.

Anything I can do to speed this along? We urgently need this feature

[sampaiodiego]

hey @drallgood .. we'll start merging the approved PRs tomorrow 😉

[drallgood]

@sampaiodiego Alright. Just wanted to check... Thanks for the update 😄