Re: [xmonad] Move EWMH support initialization to a startupHook

Excerpts from Justin Bogner's message of Sat Oct 10 23:44:51 -0600 2009:

This patch will break existing configs.

EwhmDesktops.setSupported sets some X atoms to constants. This should rightfully be done once, in a startup hook, rather than repeatedly in the log hook.

Another point in favor of applying the change pre-0.9 is that non-darcs users that explicitly use EwmhDesktops rather than one of the desktop configs already must change layoutHook and add handleEventHook when upgrading to 0.9. Modifying startupHook at the same time is not much more to ask. -- wmw