Add an option to prevent `original images` to be downloaded again when first click on zoom

[dotnetwise]

Currently it downloads all the images and then when you press click/tap to zoom it downloads the same items once again

Should be an option to specify the file format at multiple resolutions

{
 720: "image-720px-{index}.jpg", 
1080: "image-1080px-{index}.jpg", 
1920: "image-4k-{index}.jpg"
}

Also another parameter to control wether the original images (max resolution that is) are loaded from the first time and hence should not be loaded later again

[amrw-js]

hey @dotnetwise,
good enhancement, we added it to our roadmap