[Feature Request] Add local cache for searching "All Activities" events

[4Ykw]

Instead of relying on the back end servers to retrieve the last activities. I would like to recommend that a file is written into a local disk with ALL latest events where the user can search through.

Then later (this might be harder to implement or subject to other back end considerations) implement a function to retrieve from date X to Y all activities which are saved to the same local cache.

Motivation:
Sometimes I get so many activities that is hard to jump around to multi-task. Being able to search for events that are ONLY on the activity is very useful to coordinate strategic tasks.

Thanks