[iOS] Hide Home Indicator when viewing images and videos in fullscreen

At the moment the Home Indicator for iPhone X and iPad Pro devices will always be shown in the Discord app. There should be one exception where it would be a good idea to hide it: viewing images and maybe later videos in fullscreen mode. Like many other apps (e.g. the Photos App) the Home Indicator should disappear when opening the image preview.

Maybe this https://developer.apple.com/documentation/uikit/uiviewcontroller/2887510-prefershomeindicatorautohidden could help to auto-hide it?