Follow-up of EZP-23086

When inserting an image in ezoe, the preview on the popup dialog is not shown if the image path contains quotes.

Steps to reproduce:

• Configure site with urlalias_iri TransformationGroup ( in site.ini, [URLTranslator])
• Create a folder with quotes in name (for example under "Media" section)
• Add an image to this folder
• Create or edit a content with xml block (article)
• Click insert image, browse to newly created image
• Move mouse over the image preview, verify that the image thumbnail does not appear.