Simplify feature cards

services/web/public/stylesheets/app/homepage.less

@@ -137,11 +137,11 @@
 .track-changes-example {
 	.removed, .added {
 		color: #333;
-		margin: 0 -3px;
+		margin: 0 -1px;
 		padding: 0 3px;
 	}
 	.added {
-		background-color: hsl(200, 70%, 70%);
+		background-color: hsl(200, 70%, 80%);
 	}
 	
 	.removed {