Added FAQ about sharing only a single axis

[jbednar]

Users are very often confused about axiswise normalization and shared_axes. I added one FAQ, explaining how to get only a single axis to be shared, but I think there are a few other FAQs that need addressing:

• Q: When do I use shared_axes and when do I use axiswise=True?
• Q: How do I make HoloViews plots responsive in a Panel app? Should I use sizing_mode='both' or responsive=True or both? Do I put them on the individual plots, the layout, the Panel container, or...? Help!

If someone knows the answers, please add them here!

[codecov-commenter]

Codecov Report

Merging #5278 (187e30c) into master (c68e330) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5278      +/-   ##
==========================================
- Coverage   86.71%   86.69%   -0.03%     
==========================================
  Files         299      299              
  Lines       62194    62193       -1     
==========================================
- Hits        53933    53917      -16     
- Misses       8261     8276      +15     

Impacted Files	Coverage Δ
...oviews/tests/plotting/matplotlib/test_graphplot.py	98.13% <0.00%> (-1.40%)	⬇️
holoviews/plotting/bokeh/styles.py	91.57% <0.00%> (-1.06%)	⬇️
holoviews/plotting/plotly/callbacks.py	93.98% <0.00%> (-0.93%)	⬇️
holoviews/plotting/mpl/util.py	77.11% <0.00%> (-0.36%)	⬇️
holoviews/plotting/mpl/element.py	89.88% <0.00%> (-0.15%)	⬇️
holoviews/core/options.py	81.93% <0.00%> (-0.11%)	⬇️
holoviews/operation/datashader.py	79.85% <0.00%> (-0.09%)	⬇️
holoviews/plotting/plot.py	92.57% <0.00%> (-0.09%)	⬇️
holoviews/plotting/bokeh/element.py	88.71% <0.00%> (-0.07%)	⬇️
holoviews/tests/core/test_archives.py	94.54% <0.00%> (-0.05%)	⬇️

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[jlstevens]

Thanks!

This is indeed a genuinely frequently asked question and confusing enough that some explanation here is appropriate. merging.