WIP Local Storage

Rework on Local Repository to enable flushing. Added mapping
Thinking about `maps`, how about we call it `index`. That puts it inline with the rest of the system - [here](https://github.com/bholdt/Glimpse.Client/blob/RepositoryLocalWork/src/request/stores/request-summary-store.js#L185-L190). If we do that `_mapRequestsSummary` would become something like `_storeDetailIndexKey`?