Link options: preview/text options visible for inline links

[mejo-]

Describe the bug
The options to toggle a link between preview and text type is visible for links even if they're inline links, i.e. not alone in an otherwise empty paragraph. Trying to change such a link to preview doesn't do anything though.

To Reproduce
Steps to reproduce the behavior:

1. Create a link surrounded by other text
2. Click on the link, open the three-dot menu in the link bubble
3. See the preview options
4. Select "Show link preview", nothing happens

Expected behavior
I'm unsure what's the best fix:

1. Remove the preview options from the three-dot menu when the link is inline. This means inconsistent UI for inline and stand-alone links
2. Allow to transform inline links into a preview, which will split the paragraph and insert the preview as a new block node. This might be unexpected as well, but people always can undo this change.

I tend to prefer the second option.

@marcoambrosini @max-nextcloud what do you think?

Screenshots

[marcoambrosini]

Makes sense to me to go with option 2

[max-nextcloud]

@mejo- Both options are fine for me.