show ignores figsize when plotting multiple images

[sezelt]

Describe the bug
When passing a list of images to py4DSTEM.show, the figsize argument is ignored.

To Reproduce

import py4DSTEM
import numpy as np

arr = np.random.rand(128,128)

py4DSTEM.show(arr, figsize=(2,2)) # <-- works
# py4DSTEM.show(arr, figsize=(2, np.nan)) # <-- raises error (as expected)

py4DSTEM.show([arr,arr], figsize=(2,2)) # <-- figsize is not changed
py4DSTEM.show([arr,arr], figsize=(2,np.nan)) # <-- does not raise an error

Expected behavior
figsize should control the size of the figure.

Additional context
For grid plots, the undocumented keyword argument axsize controls the size of each axis in the figure. At a minimum this should be documented, and ideally there should also be a way to get the overall size of the figure.