Plone TinyMCE Strikethrough not working

[idgserpro]

This is related to plone/Products.CMFPlone#331 (before Issues was activated in Products.TinyMCE) and http://web.archive.org/web/20131025234758/https://dev.plone.org/ticket/13715.

The workaround proposed on trac works (and used in production in some of my websites as an upgradeStep
that manually sets json TinyMCE options to css classes (http://www.tinymce.com/wiki.php/Configuration:formats)), but I think that having an option in control panel of activating strikethrough (and underline) of TinyMCE's editor and not working is a bug (actually, any of TinyMCE options that can be activated in the user's interface that doesn't work is a bug to me). The workaround should somehow be integrated in a new release of Products.TinyMCE IMHO.