Order JS includes so `menu.js` works correctly

I think this is the correct order.

From `menu.js`:

    /* This should be loaded:
     *   - after scratchblocks2.js
     *   - after markitup.js
     *   - after scratchblocks2._currentLanguage is set
     *   - before markItUp() is run
     *   - before any scratchblocks2.parse() calls
     */

This should fix the scratchblocks menu.