* Bring back SubmitSignedTransaction.

* Fix long lines.

* Add missing docs.

* Update core/primitives/src/crypto.rs

Co-Authored-By: Bastian Köcher <[email protected]>

* Update node/runtime/src/lib.rs

Co-Authored-By: Bastian Köcher <[email protected]>

* Update core/primitives/src/crypto.rs

Co-Authored-By: Bastian Köcher <[email protected]>