Panel 0.11.0rc4: Auto Reload- Should not get a module_name not in sys.modules

[MarcSkovMadsen]

I'm using panel serve with the --auto flag on awesome-panel locally. When I edit the awesome-panel package (an external package which is installed via pip install -e) I get the below error

 File "c:\repos\private\awesome-panel\.venv\lib\site-packages\tornado\ioloop.py", line 905, in _run
    return self.callback()
  File "c:\repos\private\awesome-panel\.venv\lib\site-packages\panel\io\callbacks.py", line 70, in _periodic_callback
    self.callback()
  File "c:\repos\private\awesome-panel\.venv\lib\site-packages\panel\io\reload.py", line 140, in _reload_on_update
    module = sys.modules[module_name]
KeyError: 'awesome_panel'

This provides a fix.

[codecov]

Codecov Report

Merging #2032 (84786b8) into master (6f78a5a) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #2032      +/-   ##
==========================================
- Coverage   84.26%   84.26%   -0.01%     
==========================================
  Files         176      176              
  Lines       20502    20504       +2     
==========================================
  Hits        17277    17277              
- Misses       3225     3227       +2     

Impacted Files	Coverage Δ
panel/io/reload.py	66.66% <0.00%> (-1.57%)	⬇️

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