Close the upload widget on reset so that it properly disappears from the Uploads window.

onionshare_gui/receive_mode/uploads.py

@@ -290,6 +290,7 @@ class Uploads(QtWidgets.QScrollArea):
         """
         self.common.log('Uploads', 'reset')
         for upload in self.uploads.values():
+            upload.close()
             self.uploads_layout.removeWidget(upload)
         self.uploads = {}