Ability to download combined map (left side, right side)

[cmy2k]

There is currently only the ability to download each side of the swipe map separately. We should investigate whether functionality exists to download the combined map.

[jwilson8767]

One thing to consider is that CE is on the ArcGIS JS API 4.9 as in 4.10 ESRI broke the method we're using for the map swiper. In 4.13 they added their own implementation of the map swipe:
example
doc

I mention this because the latest versions of ArcGIS draws maps much faster than 4.9 and in 4.10 they also added the ability to take screenshots of the map natively:
example (Currently only loads in Chrome due to CORS issue in FF)
doc

Therefore, I suggest that at some point in '21 we update all maps in CE to the latest ArcGIS JS API version, realizing this will be non-trivial.