bug#9096: Don't clear the echo area automatically at every command execution

[Štěpán Němec]

emacs -Q
(message "Hello")
C-p

=> The message disappears, although C-p does not use minibuffer/echo
area in any way.

I've always found this behaviour annoying and counter-productive. It
often happens that I don't even notice a message because of this.

If someone actually likes the current behaviour, could we at least have
an option to prevent commands from clearing the echo area until
necessary?

  Štěpán