__main__: Restart on exit code 96

Orange/canvas/__main__.py

@@ -23,6 +23,7 @@
 import json
 from urllib.request import urlopen, Request
 import pkg_resources
+import psutil
 import requests
 from unittest.mock import patch
 
@@ -722,6 +723,17 @@ def show_message(message):
     gc.collect()
 
     del app
+
+    if status == 96:
+        log.info('Restarting via exit code 96.')
+        try:
+            p = psutil.Process(os.getpid())
+            for handler in p.open_files() + p.connections():
+                os.close(handler.fd)
+        except Exception as e:  # pylint: disable=broad-except
+            logging.error(e)
+        return os.execv(sys.executable, ['python', sys.argv[0]])
+
     return status