The swipe that only worked after the list appeared GwinG is a language-exchange messenger with four main tabs: More, Search, Friends and Profile. On a phone, a horizontal swipe on a page body moves to the neighbouring tab, just like tapping the bottom navigation bar. It is a small convenience, but it is the kind of gesture people use without thinking. A reader reported that it did not always work. Opening the Search tab on a slow connection and swiping left did nothing. As soon as the use...