Allow scroll to hide controls on mobile

Author: bigtimebuddy

src/less/preview/Preview.less

@@ -16,16 +16,18 @@ body {
 	-webkit-text-size-adjust: none;
 	/* prevent copy paste, to allow, change 'none' to 'text' */
 	.user-select(none);
+	position:absolute;
 	background-color:#000;
 	font-family: 'OpenSans', sans-serif;
 	font-weight: lighter;
 	font-size:12px;
-	height:100%;
+	height:200%; // hack for scroll-up hiding address bar
 	margin:0px;
 	padding:0px;
 	color:white;
 	width:100%;
 	text-align: left;
+	overflow: hidden;
 }
 
 .drop-down {
@@ -72,7 +74,7 @@ body {
 {
 	width:100%;
 	margin-left:0;
-	position:fixed;
+	position:absolute;
 	top:@uiHeight;
 	bottom:0;
 	left:0;
@@ -84,7 +86,7 @@ body {
 
 #pausedScreen {
 	z-index: 2;
-	position: fixed;
+	position: absolute;
 	left: 0;
 	top:0;
 	bottom:0;