chore: Reduce delta on ports to blockly-samples (#6886)

* Reduce usage of obsolete .keyCode property.
* Rename private properties/methods which violate eslint rules.
* Use arrays of bound events rather than individual properties.
* Improve typing info.
* Also fix O(n^2) recursive performance issue in theme's getComponentStyle function.
* And replace String(...) with '${...}' (smaller, faster).
* .toString() is considered harmful.

generators/javascript/lists.js

@@ -356,9 +356,9 @@ function ${JavaScript.FUNCTION_NAME_PLACEHOLDER_}(type, direction) {
     'NUMERIC': function(a, b) {
         return Number(a) - Number(b); },
     'TEXT': function(a, b) {
-        return a.toString() > b.toString() ? 1 : -1; },
+        return String(a) > String(b) ? 1 : -1; },
     'IGNORE_CASE': function(a, b) {
-        return a.toString().toLowerCase() > b.toString().toLowerCase() ? 1 : -1; },
+        return String(a).toLowerCase() > String(b).toLowerCase() ? 1 : -1; },
   };
   var compare = compareFuncs[type];
   return function(a, b) { return compare(a, b) * direction; };