#19 chat service - beta 3.2.1

[Rafael Melendreras Ruiz]

When we send a chat request to a user that is not
inside the chat session, always appear messages “in red”
that has to be with other peers and other previous
sessions.

The session menu options “clear message to send”
and “clear received messages” don’t work. (The icons
work well)

When saving a chat session, no allowed file extensions
appears by default (this could confuse the user).