Twenty Seventeen: Correct height for a Button block without text.

Props ianbelanger, laurelfulford, nayana123.
Merges [45764], [45861], and [45863] to the 5.2 branch.
Fixes #47414.
Built from https://develop.svn.wordpress.org/branches/5.2@45864


git-svn-id: http://core.svn.wordpress.org/branches/5.2@45675 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-content/themes/twentyseventeen/assets/css/editor-blocks.css

@@ -726,6 +726,10 @@ table.wp-block-table td:last-child {
 	white-space: nowrap;
 }
 
+.wp-block-button .wp-block-button__link[data-is-placeholder-visible="true"] {
+	height: auto;
+}
+
 .wp-block-button__link {
 	background-color: #222;
 	color: #fff;

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.2.3-alpha-45849';
+$wp_version = '5.2.3-alpha-45864';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.