[xmonad] darcs patch: XPrompt: Add showCompletionOnTab option (and 1 more)

Hi, ok, I managed to implement (part) of my wishes myself :-) Greetings, Joachim Mon Sep 8 12:57:58 CEST 2008 Joachim Breitner * XPrompt: Add showCompletionOnTab option This patch partially implements http://code.google.com/p/xmonad/issues/detail?id=215 It adds a XPConfig option that, if enabled, hides the completion window until the user presses Tab once. Default behaviour is preserved. TODO: If Tab causes a unique completion, continue to hide the completion window. Mon Sep 8 13:01:29 CEST 2008 Joachim Breitner * Only start to show the completion window with more than one match