[Feature] Filmstrip navigation element

I have searched the existing feature requests, both open and closed, to make sure this is not a duplicate request. • Yes The feature Filmstrip - a row of small thumbnails below picture in image viewer, is quite helpful for quick navigation, such as skipping several similar images, without exiting back to big gallery view. It also gives you better idea of where you are in the gallery (context) and what comes next. To navigate, one can either tap the thumbnail or swipe horizontally on the filmstrip to "scroll" through the pictures. I really enjoy how it's implemented by Samsung gallery app (image below), as it's not too distracting and small size of thumbnails makes it possible to scroll to next picture with small finger movement. X-plore file manager also implements filmstrip in gallery view, but the bigger thumbnails make the UX worse. Maybe the feature could come with a toggle for enabling and a slider to choose height of filmstrip - thus controll…