tidy up code, add controls-height var and implement across stylesheets, start work on operation/category lists

src/web/App.mjs

@@ -252,6 +252,9 @@ class App {
      * @fires Manager#oplistcreate
      */
     populateOperationsList() {
+        // Move edit button away before we overwrite it
+        document.body.appendChild(document.getElementById("edit-favourites"));
+
         let html = "";
         let i;