A Tactical Retreat

If a “retreat” is the antonym of “advance”, then we’ve just made one by removing all the contents of the wxAdvanced library, affectionately known as “adv”. This library used to contain a hodge-podge of classes having nothing much to do with each other except not naturally belonging to any other library and being considered too “advanced”, in some vague sense of the word, to be in wxCore. Just the trouble of explaining what it was shows why it was a bad idea to have it in the first place and we have decided