[FIX] web: fix image widget when record name is ..

PURPOSE

Before this commit, when you used the 'image' widget when the record name was
``..`` (double dots) it couldn't retrieve the image since the double dots was
decoded as the parent directory shortcut. After this commit, the double dots
will be replaced by -- with the downside to loose the true record name.

SPECIFICATIONS

Replace the .. (double dots) with -- in the filename.

Using .. may seem like a strange use case but if you actually try to find
a partner called ".." in a production database, you might be surprised ...

LINKS

Task ID-2241513 (eLearning onboarding and testing)
PR #55567

X-original-commit: dcb7a924c36cd3f3aeef891ddd8830bd66322025

addons/web/models/ir_qweb.py

@@ -52,7 +52,7 @@ class Image(models.AbstractModel):
             filename = options['filename']
         else:
             filename = record.display_name
-        filename = filename.replace('/', '-').replace('\\', '-')
+        filename = filename.replace('/', '-').replace('\\', '-').replace('..', '--')
 
         src = '/web/image/%s/%s/%s%s/%s?unique=%s' % (record._name, record.id, options.get('preview_image', field_name), max_size, url_quote(filename), sha)