How to reproduce

• Connect to cms
• Open the "Page alias" module
• Click on the "New alias" Icon to have a choice between "To a page of a site" or "To another URL"

Actual behavior

• There is no icon, in the code there is a icon : /plugins/web/resources/img/alias/page_16.png
• Under IE7, the browser displays the icon for a missing image

Expected behavior

• The icon is displayed
• OR There is no icon in order to avoid the icon "missing image" under IE7