Preview app: Reasonable preloading #1772
Description
Initial Checklist
- I understand this is a user story and questions should be posted in the Community Discussions
- I searched issues and couldn’t find anything (or linked relevant results below)
User Story
- As a user with many photos in one folder, I want the preview app to cause as little load on the server as possible, so that I don't DOS my server.
User Value
Fast UI, less load on the server.
Acceptance Criteria
- after loading the current image in high resolution, only pre-load the previous and the next image (photo roll makes precise navigation possible, preloading many images causes too much load on the server)
- respect sorting (see Preview app: image sorting #1771)