First work towards cleaning up the commandline.js rat's nest. Don't expect any of these new interfaces to stay remotely as they are.

--HG--
branch : key-processing

common/modules/overlay.jsm

@@ -176,6 +176,7 @@ var Overlay = Module("Overlay", {
                      "io",
                      "mappings",
                      "marks",
+                     "mow",
                      "options",
                      "statusline",
                      "styles",