css: highlight disabled menu items

css/dijit_basic.less

@@ -37,6 +37,10 @@
 		font-size: 13px;
 	}
 
+	.dijitMenu .dijitMenuItem.dijitDisabled:not(.dijitMenuItemSelected) .dijitMenuItemLabel {
+		color : lighten(@color-accent, 10%);
+	}
+
 	.dijitMenu .dijitMenuItem td {
 		padding: 0px;
 	}