generic nickname substitution
allow user to substitute his own nick/id with a shorter and generic "me"
allow user to hide nicknames
for the case that message status icon, nick and timestamp are not
displayed in the first line, don't include a seperator after them to
circumvent having an empty line at the beginning of the chat text when
"display messages on a new line" is true.
fix whitespace in chat
when chatHeader is modified by settings
add option to hide timestamps completely
reorder contactlist menu
"exit" should be safely tucked away in "more" submenu
make "nick substitution" depend on "show nick"
add a summary to "chat" preference
looks too off-place without it