Make controlbox appear in a smoother fashion in webkit

when clicking the controlbox toggle
Chat boxes and rooms can now be resized vertically

The new size is not stored/persisted.
Various changes, see below:

- 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