A while ago I saw a widget that shows a floating panel to list additional layers in addition to the layer list. Can someone let me know where can I locate that widget? I just don't want to re-invent the wheel..
I'm not sure about the floating panel, but all the custom widget for things like this (tuning layers on/off, adding shapes and services) are near the bottom of the Web AppBuilder Developer Edition - Resource List (updated 5/13/2018) in the "user interface and experience" and the "Services and layer:" sections. Didn't want to copy paste the whole list here, since the list is long and you will need to review them to see if any of those are the one you remember.
I found it.
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