Branch file operations when filters are applied

[Peter Levi]

When filters have been applied to the wallpaper, the user sees a different picture than the image on disk.
In this case we should have two different branches - "Original image", "Displayed image" - for the file operations in the menu (Move to Trash, Fav, Show, Open folder).

Move to Trash is probably unnecessary for the displayed image.

When filtered images are copied to favorites, they should be named "file_filter.extension" instead of just wallpaper.jpg (e.g. "original_name_oil_painting.jpg") and we should also copy the origin info txt file (naming it properly).