[erp5_web_renderjs_ui] Allow to display images from blob URL

bt5/erp5_web_renderjs_ui/SkinTemplateItem/portal_skins/erp5_web_renderjs_ui/WebPage_viewAsWeb.xml

@@ -82,7 +82,7 @@ else:\n
   response.setHeader("X-Content-Type-Options", "nosniff")\n
 \n
   # Only fetch code (html, js, css, image) and data from this ERP5, to prevent any data leak as the web site do not control the gadget\'s code\n
-  response.setHeader("Content-Security-Policy", "default-src \'none\'; img-src \'self\' data:; media-src \'self\'; connect-src \'self\' mail.tiolive.com; script-src \'self\' \'unsafe-eval\'; font-src netdna.bootstrapcdn.com; style-src \'self\' netdna.bootstrapcdn.com \'unsafe-inline\' data:; frame-src \'self\' data:")\n
+  response.setHeader("Content-Security-Policy", "default-src \'none\'; img-src \'self\' data:; media-src \'self\' blob:; connect-src \'self\' mail.tiolive.com; script-src \'self\' \'unsafe-eval\'; font-src netdna.bootstrapcdn.com; style-src \'self\' netdna.bootstrapcdn.com \'unsafe-inline\' data:; frame-src \'self\' data:")\n
 \n
   response.setHeader(\'Content-Type\', \'text/html\')\n
 \n