/topic without any arguments should display the topic in conversation_textview. Makes for easier use of things like URLs in the subject etc...
Like some IRC clients, entering "/topic" in the gc window without any args should respond with the room's current topic. This makes text selectable, and URL's clickable etc.
Attached is a patch to make this happen.
One caveat is that if an admin types: "/topicNew topic", (without a space after the /topic part), then the subject will be changed to "ew topic". This is because the code no longer tests for "/topic ", but for "/topic" without a trailing space, but assumes one is present when there are arguments to the command. This feature didn't seem to warrant yet another elif in the function, so I just left it as is.