Output editor-buttons.css earlier so the browser renders the editor in time, fixes #18820

git-svn-id: https://develop.svn.wordpress.org/trunk@19126 602fd350-edb4-49c9-b593-d223f7449a82

wp-admin/css/wp-admin.dev.css

@@ -4630,6 +4630,10 @@ input.button-highlighted,
 	width: 98%;
 }
 
+.wp-editor-container textarea.wp-editor-area {
+	width: 99.9%;
+}
+
 #template div {
 	margin-right: 190px;
 }