Android tablet bugs (#246)

* Prevent two-up being lost under options. Fixes #241.

* Working around some glitching when page was scrolled.

* Prevent software keyboard popping up again in Android Chrome.

src/components/Options/style.scss

@@ -54,4 +54,5 @@ $horizontalPadding: 15px;
 .options-scroller {
   overflow-x: hidden;
   overflow-y: auto;
+  -webkit-overflow-scrolling: touch;
 }