Fix graph not displaying due to matplotlib class update

[RephlexZero]

I use arch (AUR Package), the calibration graph display had stopped working, I saw the following error:

Traceback (most recent call last):
  File "/usr/lib/python3.11/site-packages/oversteer/gtk_handlers.py", line 265, in on_test_open_chart_button_clicked
    self.controller.open_test_chart()
  File "/usr/lib/python3.11/site-packages/oversteer/gui.py", line 599, in open_test_chart
    toolbar = self.combined_chart.get_navigation_toolbar(canvas, self.ui.window)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/oversteer/combined_chart.py", line 88, in get_navigation_toolbar
    return NavigationToolbar(canvas, window)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: NavigationToolbar2GTK3.__init__() takes 2 positional arguments but 3 were given

Caused by: https://github.com/matplotlib/matplotlib/blob/2723052176c2e1e5cc192061121423ad6685c954/lib/matplotlib/backends/backend_gtk3.py#L290

This PR proposes a fix to the matplotlib class changes only taking one argument by removing the window.

Hope this is helpful :)

[berarma]

Yes, thanks!

I guess this change will be incompatible with previous versions. Would there be a way to keep the compatibility?

I'm having an issue with the Gtk3 backend on my computer and can't test this PR. I will get back to it when I fix it.

[RephlexZero]

Not sure, but I think it makes most sense to update oversteer to follow matplotlib? Package manager should be keeping matplotlib up to date so putting in checks for its version and working around it seems wrong?
Thanks for your great work.

[jo5huajohn]

Could something like this work?

def get_navigation_toolbar(self, canvas, window=None):
    return NavigationToolbar(canvas) if matplotlib.__version__ >= '3.6' else NavigationToolbar(canvas, window)