Run submission in a separate thread, and more explicit state

Also more explicit timeouts and an overall better handling of errors.

benchmark/space/draw.py

@@ -5,7 +5,7 @@ import blf
 import bpy
 
 from ..foundation import util
-from ..submission.client import CommunicationError
+from ..submission import exceptions
 
 from . import G
 
@@ -231,8 +231,16 @@ def _after_submission_text() -> str:
         return f'Unable to connect to the Open Data platform. ' \
                f'Please check your internet connection and try again.'
 
+    if isinstance(ex, requests.exceptions.Timeout):
+        return f'There was a timeout communicating with the Open Data platform. ' \
+               f'Please check your internet connection and try again.'
+
+    if isinstance(ex, exceptions.TokenTimeoutError):
+        return f'There was a timeout waiting for a Client Authentication token. ' \
+               f'This is fine, just try again.'
+
     # If not our own exception class, show generic message.
-    if not isinstance(ex, CommunicationError):
+    if not isinstance(ex, exceptions.CommunicationError):
         return f'Error submitting your results: {ex}'
 
     # Return proper message based on the HTTP status code of the response.