Show error window for unhandled exceptions

Use exception hook from main thread for all threads

Use signal to delegate error window creation to GUI thread

Add more information to issue template

Update to PyQt5

Switch from Github to REST-Service

Report to web service instead of opening the browser

Fix imports

Change crashhub URL to electrum.org server

Explain that exception hooks are only used in the Qt Gui now

lib/util.py

@@ -707,3 +707,29 @@ class QueuePipe:
             self.send(request)
 
 
+
+
+def setup_thread_excepthook():
+    """
+    Workaround for `sys.excepthook` thread bug from:
+    http://bugs.python.org/issue1230540
+
+    Call once from the main thread before creating any threads.
+    """
+
+    init_original = threading.Thread.__init__
+
+    def init(self, *args, **kwargs):
+
+        init_original(self, *args, **kwargs)
+        run_original = self.run
+
+        def run_with_except_hook(*args2, **kwargs2):
+            try:
+                run_original(*args2, **kwargs2)
+            except Exception:
+                sys.excepthook(*sys.exc_info())
+
+        self.run = run_with_except_hook
+
+    threading.Thread.__init__ = init