fix issues with media server not going away

- use a non-daemonized python thread
- shut the server down on exit, including from profile manager
- use a timeout on requests, or the connection that webengine holds open
will block the thread and prevent it from exiting when anki closes

aqt/main.py

@@ -111,7 +111,7 @@ class AnkiQt(QMainWindow):
         f.setupUi(d)
         f.login.clicked.connect(self.onOpenProfile)
         f.profiles.itemDoubleClicked.connect(self.onOpenProfile)
-        f.quit.clicked.connect(lambda: sys.exit(0))
+        f.quit.clicked.connect(self.cleanupAndExit)
         f.add.clicked.connect(self.onAddProfile)
         f.rename.clicked.connect(self.onRenameProfile)
         f.delete_2.clicked.connect(self.onRemProfile)
@@ -249,8 +249,12 @@ To import into a password protected profile, please open the profile before atte
         if browser:
             self.showProfileManager()
         else:
-            self.errorHandler.unload()
-            sys.exit(0)
+            self.cleanupAndExit()
+
+    def cleanupAndExit(self):
+        self.errorHandler.unload()
+        self.mediaServer.shutdown()
+        self.app.exit(0)
 
     # Collection load/unload
     ##########################################################################

aqt/mediasrv.py

@@ -8,6 +8,7 @@ import http.server
 import socketserver
 import errno
 from anki.utils import devMode
+import threading
 
 # locate web folder in source/binary distribution
 def _getExportFolder():
@@ -29,7 +30,7 @@ _exportFolder = _getExportFolder()
 class ThreadedHTTPServer(socketserver.ThreadingMixIn, http.server.HTTPServer):
     pass
 
-class MediaServer(QThread):
+class MediaServer(threading.Thread):
 
     def run(self):
         self.port = 10000
@@ -46,8 +47,13 @@ class MediaServer(QThread):
             break
         self.server.serve_forever()
 
+    def shutdown(self):
+        self.server.shutdown()
+
 class RequestHandler(http.server.SimpleHTTPRequestHandler):
 
+    timeout = 1
+
     def do_GET(self):
         f = self.send_head()
         if f: