Fix lock/sync race condition - wallet lock status worker is paused and resumed in right places #394

Also there could be observed:
```
clive.__private.core.commands.sync_state_with_beekeeper.InvalidWalletAmountError: Command SyncStateWithBeekeeper failed. Reason: The amount of wallets is invalid. Profile can have either 0 (if not created yet) or 2 wallets.
```

sometimes before this commit.

Easier reproduction when setting
`CLIVE_BEEKEEPER__REFRESH_TIMEOUT_SECS=0.01`