Allow to use remote control from the same machine

This is irrelevant for ordinary users since they do not invoke the Remote Control on the same machine. The advantage for developers is that they can use MagicMirror and Remote Control on the same machine.

Author: KristjanESPERANTO

node_helper.js

@@ -822,7 +822,7 @@ module.exports = NodeHelper.create(Object.assign({
                 try {
                     let electron = require("electron").BrowserWindow;
                     if (!electron) { throw "Could not get Electron window instance."; }
-                    let win = electron.getFocusedWindow();
+                    let win = electron.getAllWindows()[0]
                     switch (query.action) {
                         case "MINIMIZE":
                             win.minimize();