Recognize that Node is out of sync and throw corresponding error

If a node is out of sync, user still sees the "Sync clock" issue. Also include the chain head block and time in the thrown error.

https://github.com/bitshares/bitsharesjs/blob/6bad1cf876fb0a0737ca8f654d6615e1358ea758/lib/chain/src/ChainStore.js#L151

Start in lib/chain/src/ChainStore.js at the referenced line and inspect how the current "Sync clock" issue is detected and thrown. Confirm how the chain head block and time are available there. Done means an out-of-sync node produces the corresponding error and includes that head block and time.

Written by the indexing model from the issue text.