Allowed scroll on binary-file container

Set overflow in auto mode to allow large images.

services/web/public/stylesheets/app/editor/binary-file.less

@@ -2,6 +2,7 @@
 	padding: @line-height-computed / 2;
 	background-color: @gray-lightest;
 	text-align: center;
+	overflow: auto;
 	img {
 		max-width: 100%;
 		max-height: 90%;
@@ -17,4 +18,4 @@
 		color: @gray;
 	}
 
-}
+}