Added a few tests for RFC822.Message

- Inline attachments in from_composed_email
- get_recipients
- get_searchable_body
- get_searchable_recipients
- get_network_buffer
Status Job ID Name Coverage
  Build
passed #490950
fedora

00:04:17

passed #490951
ubuntu

00:05:46

 
  Test
passed #490952
flatpak

00:12:20

 
  Deploy
passed #490953
review

00:00:35

manual #490954
allowed to fail manual
stop_review