BT hid navigation fix (#911)

* bt: fix bt hid navigation
* Cli: change datetime format to more ISO-ish, add datetime validation.

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

firmware/targets/f6/furi-hal/furi-hal-bt.c

@@ -160,6 +160,7 @@ bool furi_hal_bt_change_app(FuriHalBtProfile profile, BleEventCallback event_cb,
     gap_thread_stop();
     FURI_LOG_I(TAG, "Reset SHCI");
     SHCI_C2_Reinit();
+    osDelay(100);
     ble_glue_thread_stop();
     FURI_LOG_I(TAG, "Start BT initialization");
     furi_hal_bt_init();