Facebook-owned WhatsApp is testing a new feature called "disappearing messages" that will let you send messages that disappear after a set interval. This feature was spotted by WABetaInfo in version 2.19.275 of WhatsApp for Android's beta app in group chat settings. It allows you to send messages which would disappear automatically from the conversation after five seconds or one hour. WABetaInfo reports that this new privacy feature is currently under development and it's unclear when it will be rolled out to users across the globe on the stable channel. However, beta users will be...