Instead of differentiating between trimmed chats and minimized chats, the two
are now combined into the same thing.
This commit contains some initial work, but functionality is still impaired.
Configuration options have changed a bit.
show_emoticons and show_call_button are now removed. Instead the toolbar is
configured via a new config option: "visible_toolbar_buttons".
- disable drag resizing when chatboxes are minimized.
- refactored chat box and chat room markup so that they are more similar.
- don't make the chat box title clickable if no vcard URL is available
- make only the title text clickable, not the whitespace
- fixed toggling of resized chats