[FIX] odd behavior in cke widgets

in "block-level" widgets (divs), when hitting [return] instead of
adding a newline in the widget a new bit of widget may be added. This
is caused by an incompability between widgets and the enterKey plugin.

Remove enterKey, behavior on [Return] is slightly worse (always
inserts br) but widgets don't get broken.

See https://dev.ckeditor.com/ticket/11326 for issue in upstream.

bzr revid: xmo@openerp.com-20131217153751-7fbwp34o8kac9x94

addons/website/static/src/js/website.editor.js

@@ -859,7 +859,7 @@
             var plugins = [
                 'a11yhelp', 'basicstyles', 'blockquote',
                 'clipboard', 'colorbutton', 'colordialog', 'dialogadvtab',
-                'elementspath', 'enterkey', 'entities', 'filebrowser',
+                'elementspath', /*'enterkey',*/ 'entities', 'filebrowser',
                 'find', 'floatingspace','format', 'htmlwriter', 'iframe',
                 'indentblock', 'indentlist', 'justify',
                 'list', 'pastefromword', 'pastetext', 'preview',