Remove download button from own clients and sort clients

[mmrose]

In the chat view, there is a download button on every client connected to the hub, even the own one.
This should be removed.

Also the clients should be sorted alphabetically.

[kraiz]

Fixed Ordering.

But funny fact: There seems to be no way to detect which user is the current "self" one. Do you have any suggestions?

[kraiz]

As there's no way to detect that, i close this as wontfix.