[FR] Embedded files should be update after being saved by their default apps

### Description

After opening an embedded file, like let's say a some_text_file.txt, it opens with the default app (text editor) and the user can make changes and save the file, that will automatically update the original embedded file.

See also:
- #6554
- #6553

### Impact

All users that want edit embedded / attached files.

### Additional Context

_No response_