Sidebar Connectivity Status (#1268)

* store athena connected-at time

* refactor

* deref

* dt import

* Athena status based on last ping time param

* upd test for pingtime

* lower error timeout

common/params.py

@@ -78,6 +78,7 @@ keys = {
   "IsTakingSnapshot": [TxType.CLEAR_ON_MANAGER_START],
   "IsUpdateAvailable": [TxType.CLEAR_ON_MANAGER_START],
   "IsUploadRawEnabled": [TxType.PERSISTENT],
+  "LastAthenaPingTime": [TxType.PERSISTENT],
   "LastUpdateTime": [TxType.PERSISTENT],
   "LimitSetSpeed": [TxType.PERSISTENT],
   "LimitSetSpeedNeural": [TxType.PERSISTENT],