(inline app?) Combining unicode emojis (e.g. hammer and pick emoji) causes re-paint offset issues #6355
Description
This may be related to the other issues with multi-character unicode. But I feel it's a bit different. It's not (just) about messed up width.
This is tested against Textual 7.4.0.
The bug
A simple inline app with an OptionList. The Options contain the text "⚒️" (or any combined unicode, "simple" emoji works fine).
This causes the whole app (I'm guessing) to re-render, but offset one or more lines each time. It re-renders on mouse movement, for instance (I'm guessing that's standard).
In full-screen the issue isn't noticeable (i.e. could be there, but it doesn't cause the title to "grow".
