startSyncing does not allow to save wallet until sync completes

[mainnet-pat]

If I install a listener for wallet sync and try to save the wallet periodically while it syncing (so that the sync process is not lost between browser page reloads) the call to save hangs indefinitely.

The very slow workaround here is to do:

            await wallet.stopSyncing();
            await wallet.save();
            await wallet.startSyncing(15000);

[woodser]

await wallet.stopSyncing() calls down to wallet2->stop() immediately, which ought to stop the sync process as soon as possible:

monero-ts/src/main/ts/wallet/MoneroWalletFull.ts

Line 625 in 059e29f

this.module.stop_syncing(this.cppAddress); // task is not queued so wallet stops immediately

https://github.com/woodser/monero-cpp/blob/bdc0ee7666fc4ba4550501b24b3d2d49f54365cd/src/wallet/monero_wallet_full.cpp#L1568

So I'm surprised this is an issue, and not sure what else could be done unless one of my assumptions is wrong.