Creating a link to a non-existent page from the CKEditor does not cleanup the page name according to the naming strategies configured on the wiki

Steps to reproduce:

• Activate a naming strategy on the wiki, e.g. the slug one
• Go to a page
• Edit in wysiwyg editor
• use the link button on the toolbar to create a new link
• in the link dialog, in the Page input, type a new name, with spaces and other special characters, such as this:
  
• hit OK
  • the dialog closes and a link is added in the page, with the specified label
• save the page
• the link is displayed on the page, with a question mark next to it

Expected result:

• when clicking on the non-existing page link, the name of the page that gets created following the subsequent create dialog follows the chosen naming strategy

Actual result:

• the page that gets created following the subsequent create dialog is the exact one that was typed in the CKeditor dialog, including characters that shouldn't be in, cf. chosen naming strategy. For slug strategy, we get this, for the example above: