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.
- 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
