How one could override files in nested portal_skins folder?
The default behavior seems to be that you need to copy whole folder structures if you want to override a single file. This is a maintenance nightmare.
E.g. how to override file:
Producs.TinyMCE/skins/tinymce/plugins/table/js/table.js
... without needing to create a duplicate for the whole Products.TinyMCE skins codebase?