Bug #5197 - fixing displaying of old wysiwyg attachments after a 5.12 migration on a Silverpeas with multilingual content activated...

- fixing also the display of wrong content according to the selected content language
- fixing also a technical error on windows platform around the computing of the JCR home directory path

Due to this fix, a new release of Silvepeas installer packages must obviously be done.

Don't forget to check the Silverpeas-Core project