Rotate: grid not working

[magnunor]

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On Ubuntu 16.04, using master branch of HyperSpyUI the optional grid in the rotate window does not do anything: no grid shows up:

s = hs.signals.Signal2D(np.random.random(size=100, 100)))
s.plot()

Then press "Rotate" button on sidebar (opens the rotate window), then tick preview in the rotate window (gives an interactive preview window), tick Grid (nothing happens).

[vidartf]

Yes, the grid is one big TODO. Good to have an issue to track this :)