Offline mode cashed data not fully available

[meliodev]

Data is cashed once a user loads a screen (component mounts). Hence, for example, if a user is online and did not open the screen containing Products list. The data within Products collection will not be available when user goes offline.
Proposed solution: Once the app starts, fetch all data necessary for the functioning of offline mode features.
Drawbacks: Possible lower performance, and higher cost of reads.