Bulk hexpansion provisioner doesn't seem to work on alpha4

[thinkl33t]

Describe the bug

When trying to bulk provision some hexpansions on 2.0.0 alpha4, i get a crash-to-repl

Downloading https://github.com/emfcamp/hexpansion-firmwares/releases/download/latest//firmware_0x1337_0xAEAE.tar.gz

Traceback (most recent call last):
  File "main.py", line 43, in <module>
  File "system/scheduler/__init__.py", line 243, in run_forever
  File "asyncio/core.py", line 1, in run_until_complete
  File "asyncio/core.py", line 1, in run_until_complete
  File "asyncio/core.py", line 1, in run_until_complete
  File "system/scheduler/__init__.py", line 239, in _main
  File "asyncio/funcs.py", line 1, in gather
  File "asyncio/core.py", line 1, in run_until_complete
  File "system/eventbus.py", line 101, in run
  File "asyncio/funcs.py", line 1, in gather
  File "asyncio/core.py", line 1, in run_until_complete
  File "firmware_apps/hexpansionfw.py", line 431, in _button_handler
  File "firmware_apps/hexpansionfw.py", line 353, in button_event
  File "app_components/layout.py", line 224, in button_event
  File "app_components/layout.py", line 78, in button_event
  File "firmware_apps/hexpansionfw.py", line 318, in bulk_provision_handler
  File "firmware_apps/hexpansionfw.py", line 328, in _bulk_provision
  File "async_helpers.py", line 54, in unblock
  File "asyncio/funcs.py", line 1, in gather
  File "asyncio/core.py", line 1, in run_until_complete
  File "async_helpers.py", line 43, in periodic
TypeError: 'NoneType' object isn't iterable

To Reproduce
Steps to reproduce the behavior:

1. Hexpansions
2. Select Hexpansion (tested in port 3 and 4)

Expected behavior
Should work :)

Screenshots
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Additional context
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