+ * Sticky aside on page scroll
+ * We enable the sticky aside only when window is wider than
+ * 976px - which is the maximum width where the aside is shown in
+ * mobile style - because on chrome-based browsers (desktop and
+ * android) the sticky plugin in mobile style causes the browser to
+ * scroll back to top the main content, making it impossible
+ * to navigate.
+ * A side effect is that the sitky aside isn't really responsive,
+ * since is enabled or not at page loading time.