When closing all docks and then exiting, Friture crashes on next start.

[jakicoll]

First of all: Thanks for this very useful and elegant piece of software. :)

I poked around a little and stumbled upon this:

If I close all the docks and then exit Friture, it won't ever start again (until I remove the configuration file I found in ~/.config/Friture/).

Friture Version: 0.35

Stacktrace:

2019-01-22 19:54:55,272 CRITICAL friture.exceptionhandler: Unhandled exception: Traceback (most recent call last):
  File "main.py", line 10, in <module>
    main()
  File "./friture/analyzer.py", line 350, in main
    window = Friture()
  File "./friture/analyzer.py", line 113, in __init__
    self.restoreAppState()
  File "./friture/analyzer.py", line 201, in restoreAppState
    self.migrateSettings()
  File "./friture/analyzer.py", line 191, in migrateSettings
    for dockname in docknames:
TypeError: 'NoneType' object is not iterable

You can find the friture.conf here: https://gist.github.com/jakicoll/32e39cc45112a6304c5400316647a1e4

[tlecomte]

Thank you very much @jakicoll for this report! (It's also nice to see that you got it working on Linux 👍 ) I could not reproduce the problem on Windows. I'll try to find some time to understand why under Linux the docknames settings ends up being an invalid object.