Twenty Seventeen: iPad mini, iPhone 5 search form rendering issues fix

On the these devices, there is an issue with the button rendering for the search form. This resolves that.

Props Caspie, alex27, davidakennedy
Fixes #38396


Built from https://develop.svn.wordpress.org/trunk@38888


git-svn-id: http://core.svn.wordpress.org/trunk@38831 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-content/themes/twentyseventeen/style.css

@@ -936,6 +936,7 @@ input[type="datetime-local"],
 input[type="color"],
 textarea {
 	color: #666;
+	background-image: -webkit-linear-gradient(rgba(255, 255, 255, 0), rgba(255, 255, 255, 0));
 	border: 1px solid #bbb;
 	-webkit-border-radius: 3px;
 	border-radius: 3px;

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-alpha-38887';
+$wp_version = '4.7-alpha-38888';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.