Allow figsize arguments in plot.plot_section

[TobiasGlaubach]

Is your feature request related to a problem? Please describe. I have not found a way yet to set the figure size for the function plot.plot_section did I miss something, or is this intended?

Describe the solution you'd like Be able to pass figsize arguments to plot.plot_section in the way you would pass it to figure of matplotlib.pyplot.

Describe alternatives you've considered Tried a few things in Jupyter, but could not make it work.

I could have a look at it and make a pull request if OK by you guys.