Highlighted selected items in the selection panel.

Also added some improvements suggested here: http://www.luster.io/blog/9-29-14-mobile-web-checklist.html

frontend/delta/scss/core/behavior.scss

@@ -56,7 +56,7 @@ $transition-duration: 0.5s;
 @mixin sliding-panel ($side, $size) {
 	position: fixed;
 	z-index: 20;
-	overflow: scroll;
+	@include overflow-scroll;
 
 	@if $side == left {
 		@include sliding-panel-left($size);

frontend/delta/scss/core/layout.scss

@@ -2,6 +2,7 @@
 
 .page {
 	@include pageElement();
+	@include user-select(none);
 }
 
 .mainPage {

frontend/delta/scss/core/mixin.scss

@@ -141,3 +141,20 @@
 	0% { @include transform(0deg, 0, 0); }
 	100% { @include transform(359deg, 0, 0); }
 }
+
+@mixin user-select($value) {
+	//	http://css-tricks.com/almanac/properties/u/user-select/
+	//	none | text | all | element
+	-webkit-user-select: $value;	/* Chrome all / Safari all */
+	-moz-user-select: $value;		/* Firefox all */
+	-ms-user-select: $value;		/* IE 10+ */
+
+	/* No support for these yet, use at own risk */
+	-o-user-select: $value;
+	user-select: $value;
+}
+
+@mixin overflow-scroll () {
+	overflow: scroll;
+	-webkit-overflow-scrolling: touch;
+}