Backported customizable 404 page from unstable (thanks Vadi); made customizable 404 page have a {STANDARD404} variable available to allow embedding the "default" 404 content.

/* This is the CSS file for the noneditable elements plugin */

.mceEditable {
	/*border: 1px dotted #0000cc;*/
}

.mceNonEditable {
	/*border: 1px dotted #cc0000;*/
}