Bundled Themes: Twenty Nineteen center and right-aligned heading accents appear broken.

Fixes the center and right aligned heading accents so that they align with the text, instead of just staying left-aligned.

Props kjellr, melchoyce.
Fixes #49699.
Built from https://develop.svn.wordpress.org/trunk@47591


git-svn-id: https://core.svn.wordpress.org/trunk@47366 1a063a9b-81f0-0310-95a4-ce76da25c4cd