xhtml_style: remove hashes from icons.png URLs
this change was made with: find product/ERP5/bootstrap/erp5_xhtml_style/SkinTemplateItem/portal_skins/erp5_ckeditor/ckeditor/ -type f | xargs sed -i 's/\\?t=445cf24ebd//g'
this change was made with: find product/ERP5/bootstrap/erp5_xhtml_style/SkinTemplateItem/portal_skins/erp5_ckeditor/ckeditor/ -type f | xargs sed -i 's/\\?t=445cf24ebd//g'