client: Add last edit marker to TableView so we don't lose our place.

It's late at night & I need to go to bed, but I'm in the middle of this

src/static/js/ui/TableView.mjs

@@ -24,7 +24,7 @@ class TableView {
 			]
 		});
 		for(let def of tabledef.items) {
-			
+			// MARKER: We were last editing here
 		}
 		
 		this.el.replaceChildren(parts);