Twenty Seventeen Fixes search block button styles not being the same.

The search block button was not the same back and front for background, text and font weight. This also reflects in editor-blocks stylesheet.

Props viralsampat, pamprn, sabernhardt, shailu25.
Fixes #61888.


git-svn-id: https://develop.svn.wordpress.org/trunk@58911 602fd350-edb4-49c9-b593-d223f7449a82

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

@@ -560,6 +560,16 @@ html[lang="th"] .edit-post-visual-editor * {
 	text-align: left;
 }
 
+/* Search */
+
+.wp-block-search__button {
+	background-color: #222;
+	color: #fff;
+	font-size: 16px;
+	font-weight: 800;
+	line-height: 1.5;
+}
+
 @media screen and (min-width: 30em) {
 	.wp-block-quote.alignleft p,
 	.wp-block-quote.alignright p,