bug(rich-text) selection that includes link will move link popover to top of selection

[yellis]

Describe the bug
n rich text mode, when selecting a link and moving upwards, the link popover is also moved up vertically to under blocks that aren't links.

To Reproduce

1. RT mode, type in a few lines of text
2. Make a link towards the bottom
3. Start to highlight from bottom to top
4. Observe: link popover stays visible, and is stuck to the top of the selected area

Expected behavior
No link popover visible unless the selection is only on one link. Otherwise only show the link popover when the cursor is on the link.

Screenshots

Desktop (please complete the following information):
Windows 11 Chrome 103

Additional context
https://meta.stackexchange.com/a/380439/51

[b-kelly]

Popover is currently following the selection $anchor, should be instead following the selection $head.