Inline control alignment regression

[JesseDietrichson]

Hi there,

I’ve been using AvaloniaEdit as a message textbox to support basic formatting (e.g., bold, italic) as well as richer rendering features such as inline mention buttons (e.g., @Daerccoan).

In Avalonia versions 11.3.5 through 11.3.8, the alignment of inline controls appears to have changed. Specifically, I’m unable to get inline buttons to align/center properly with the surrounding text. This behavior used to work as expected in earlier versions.

I also verified that the issue reproduces in the AvaloniaEdit demo with these versions. Please see the attached screenshots for reference.

Here's a screenshot from Avalonia version 11.3.4: