Tagging and albums based on tags

Droppics now lacks the possibility to create collections using tags (for instance the year it was made, and the subject of the picture) from one file folder. This means that you can create several sub-sets from one collection of files. Now you need to create several copies of files: for each tag one. This is extra work, errorprone and the double or treble version of the same file takes extra space.

Wit a tag function the presentation of images would be a lot more flexible with a lot less redundancy (extra copies of files are no longer needed).