I was emotional and wrong. After revisiting multiple other chats, all of
them do it this way. Adding reactions to existing ones was what I was
missing. the first reaction can be in the top right bar.
For the config.json (server-level default for new users):
```json
{
"defaultSettings": {
"externalImages": "homeserver"
}
}
```
User's own choice in the UI always overrides the config.json default.
