Feature Request: Fallback for Reply-To bookmarklet feature

[pfefferle]

What

Implement a fallback to the in-reply-to feature for links that are not ActivityPub enabled.

Why

The current implementation always assumes that a used link supports ActivityPub. This might cause errors or might be misunderstood by users, so it might be nice to have a generic fallback for non Mastodon et al links.

How

@mattwiebe and I talked about maybe using the embed block instead then.