I wanted to change the icon in site content for a custom list in SharePoint Online. Setting the
ImageUrl property of the list did the job. But then I discovered that this had also changed the icon for the list when adding web parts, distorting this view:
Strangely setting ImageUrl has changed two icons that need to be of different size and color. I can see on other lists that SharePoint is using two different images for this by default.
How do I properly change the list icons? Can this even be done with CSOM/JSOM? (If not, can I set the list icons back to the defaults, reverting my changes?)