Styles are not filtered anymore when pasting from LibreOffice

We included the pastefromlibreoffice CKEditor plugin in db2dc...792b3 for CKEDITOR-368 in order to improve the paste from LibreOffice but unfortunately this plugin disables our paste filter that removes the styles.

As indicated on our documentation, the reason we want to filter the styles by default on paste is to achieve a consistent style across the wiki and to allow the users to focus on the content:

Note that by default XWiki doesn't enable all the features available in CKEditor because we want the users to focus on the content and leave the styling in the hands of the XWiki skin. This way all wiki pages will have a consistent style. For this we disable by default the features that are related to styles, such as text aligning, changing fonts or text color.

Note that the paste filter can be disabled using the pasteFilter configuration from the dedicated administration section.