Fix #13632 and make new file menu more consistent with button

apps/files/css/files.css

@@ -34,12 +34,13 @@
 	border-bottom-left-radius: 0;
 	border-bottom-right-radius: 0;
 	border-bottom: none;
+	background: #f8f8f8;
 }
 #new > ul {
 	display: none;
 	position: fixed;
 	min-width: 112px;
-	z-index: 10;
+	z-index: -2;
 	padding: 8px;
 	padding-bottom: 0;
 	margin-top: 14px;
@@ -47,6 +48,7 @@
 	text-align: left;
 	background: #f8f8f8;
 	border: 1px solid #ddd;
+	border: 1px solid rgba(190, 190, 190, 0.901961);
 	border-radius: 5px;
 	border-top-left-radius: 0;
 	box-shadow: 0 2px 7px rgba(170,170,170,.4);