The font on buttons was displaying less than the font size when applied through the editor. This resets the relative measurement on wp-block-button__link when either its Buttons or Button block has a custom size.
Props nidhidhandhukiya, sabernhardt, SergeyBiryukov, manojmaharrshi, darshitrajyaguru97, shailu25.
Fixes#56443.
Built from https://develop.svn.wordpress.org/trunk@58199
git-svn-id: http://core.svn.wordpress.org/trunk@57662 1a063a9b-81f0-0310-95a4-ce76da25c4cd