Scroll to load

[nicolas-raoul]

If database speed is an issue, the webapp should load data dynamically.

Rather than displaying 30/60/120/300/800/1200/2000 images, the app should first query for 10 items, and load more dynamically when the user scrolls down. If the images are bigger (see #6) users will not notice and start patrolling rather than wait for 2000 images to load before starting reviewing.

This "scroll-to-load" behavior is especially needed on mobile, where we must strive to not use more memory than needed (apps using more memory get kicked out quickly when the user switches apps, which degrades user experience a lot).

Google Images is an example of that behavior.