Paragraph: Misplaced caret when clicking on a Drop Cap-enabled paragraph

[mcsf]

Describe the bug

Paragraph's "drop cap" feature is only previewed when a block isn't selected (due to poor handling of some browsers when typing in a text field with a drop cap). Thus, when such a block is selected, the drop cap recedes, changing the composition of the text.

Clicking on a block to select it results in the caret being placed where the click happened, and not at the intended text offset.

To Reproduce

See screencast.

Screenshots

[mcsf]

@iseulde: I haven't bisected, but I suspect this is a recent regression stemming from RichText changes. If this is a quick fix, it's worth getting in soon. Otherwise, we can punt.

[ellatrix]

I think this has always been an issue?

[mcsf]

Self-closing as duplicate of #11119.