Hide soft menu buttons on some devices in fullscreen mode via navigationUI controls

[cevaris]

Feature request

Configure navigationUI controls to "hide" soft UI navigation buttons; mainly Android devices.
See API here https://developer.mozilla.org/en-US/docs/Web/API/FullscreenOptions/navigationUI

Specifically this code,

viewerjs/src/js/others.js

Line 152 in 84f87cc

// Element.requestFullscreen()

Something like
documentElement.requestFullscreen({ navigationUI: "hide" }));