Lightbox: Add trash button and allow zoom with mouse scroll button

[edsonsbj]

Describe the enhancement you'd like

I would like to see two features in librephotos

1. Zoom with mouse scroll button.
2. Recycle Bin button when viewing Images and videos or when pressing the delete key on the.

Describe why this will benefit the LibrePhotos

In the case of the trash can button in the preview, it would be useful when you have a large photo library and then you are doing that cleaning and you come across some images that you think are good but when you open them in full size you see some imperfections and then with the button you would press and that's it better than if you leave the photo and then end up selecting the best one and leaving the worst one.

[kkmaslowski]

+1 for delete button and delete shortcut in viewer.

[meichthys]

@edsonsbj The zoom feature is already available (I was able to use it in the LibrePhotos demo instance). There is however a related issue about the zoom not showing the original photo: https://github.com/LibrePhotos/librephotos/issues/593