Keep track of version code. Hence, improving ability to download old versions

[wad8989]

Currently, Aurora Store can download old version via Manual Download with version code. However in real life we have nowhere to obtain the version code.

If the store can save the version code and the version name to a db, on event like any user browsing/downloading the app, or at least commenting to the minimal poke.
Then it can somehow keep track of the version code. Make the ability to download old version really feasible instead of guessing code.