TRA-4017 Bring back `getOldEntries` method using fetch API and always start streaming from now (#518)

* Bring back `getOldEntries` method using fetch API

* Determine no more data on top based on `leftOff` value

* Remove `entriesBuffer` state

* Always open WebSocket with some `leftOff` value

* Rename `leftOff` state to `leftOffBottom`

* Don't set the `focusedEntryId` through WebSocket if the WebSocket is closed

* Call `setQueriedCurrent` with addition

* Close WebSocket upon reaching to top

* Open WebSocket upon snapping to bottom

* Close the WebSocket on snap broken event instead

* Set queried current value to zero upon filter submit

* Upgrade `react-scrollable-feed-virtualized` version and use `scrollToIndex` function

* Change the footer text format

* Improve no more data top logic

* Fix `closeWebSocket()` call logic in `onSnapBrokenEvent` and handle `data.meta` being `null` in `getOldEntries`

* Fix the issues around fetching old records

* Clean up `EntriesL...