Quick fix for #416

`webbrowser.open()` doesn't seem to need additional parallelization, but spawn it in a thread just so it can delay to give the web server more time to get ready to serve pages. In any case, not spawning a webserver process fixes the Issue.

When `webbrowser.open(url)` has to launch Chrome, Chrome opens the Fireworks `url` in a new window then restores its previous tabs in another window right on top of the Fireworks window, kind of hiding it.

Author: 1fish2

.gitignore

@@ -52,4 +52,6 @@ fw_tutorials/firetask/addition_task2.py
 fw_tutorials/firetask/words.txt
 
 my_launchpad.yaml
+.python-version
+FW.json
 .DS_Store

fireworks/scripts/lpad_run.py

@@ -535,6 +535,13 @@ def set_priority(args):
     lp.m_logger.info("Finished setting priorities of {} FWs".format(len(fw_ids)))
 
 
+def _open_webbrowser(url):
+    """Open a web browser after a delay to give the web server more startup time."""
+    import webbrowser
+    time.sleep(2)
+    webbrowser.open(url)
+
+
 def webgui(args):
     from fireworks.flask_site.app import app
     app.lp = get_lp(args)
@@ -554,14 +561,11 @@ def webgui(args):
             app.BASE_Q_WF["state"] = app.BASE_Q["state"]
 
     if not args.server_mode:
-        from multiprocessing import Process
-        p1 = Process(
-            target=app.run,
-            kwargs={"host": args.host, "port": args.port, "debug": args.debug})
+        from threading import Thread
+        url = "http://{}:{}".format(args.host, args.port)
+        p1 = Thread(target=_open_webbrowser, args=(url,))
         p1.start()
-        import webbrowser
-        time.sleep(2)
-        webbrowser.open("http://{}:{}".format(args.host, args.port))
+        app.run(host=args.host, port=args.port, debug=args.debug)
         p1.join()
     else:
         try: