The h1 for entry-title was not the same between the editor and front end. This fixes that in the by setting wp-block-post-title font sizes together with h2 and combines post-section-dash mixin for both h1 and h2.
Props sabernhardt, nkeller15, shailu25.
Fixes#58440.
Built from https://develop.svn.wordpress.org/trunk@58198
git-svn-id: http://core.svn.wordpress.org/trunk@57661 1a063a9b-81f0-0310-95a4-ce76da25c4cd