[imp] Added flexible ordering to the similar tags module.

siehe: https://github.com/joomla/joomla-cms/commit/08f2cbe772681567ca52211f05f4e08d7bda7dbe
Update de-DE.mod_tags_similar.ini
Merge pull request #68 from zero-24/patch-27

[imp] Added flexible ordering to the similar tags module.