Board Thread:Editing Corner/@comment-30544675-20191025154400/@comment-30544675-20191106191925

Thanks Tiiu and Gaia for the positive feedback on #1. Today I added the latest collections and also added $ to many of the old challenge collections. (The $ for older collections was one big edit which could be easily undone.)  I haven't yet removed the long list below the table. I want to be sure there are no objections to what I have done so far.