Improve plot docstring

[ericpre]

As noticed in #3140, there is room for improvement in setting/passing arguments to the plot functions:

• review navigator_kwds default value, need to remove setting mutable argument as default in the method definition
• out-of-date docstring, kwargs of ImagePlot
• docstring of ImagePlot.plot

[CSSFrancis]

Just a note that we probably shouldn't be directly passing arguments to super. (or at least that is my understanding from the bit of reading that I have been doing)

By passing named arguments to the super.plot functions it opens us up to some weird behavior like what @thomasaarholt saw previously in #2338.

[ericpre]

I didn't look into details but this is most likely related to use of mutable object as default argument: https://docs.quantifiedcode.com/python-anti-patterns/correctness/mutable_default_value_as_argument.html