Elaborate Serializing and Deserializing of Data

[andrewpeters9]

Some improvements can be made to the serializing and deserializing of data:

• this.hdk can/should be serialised and deserialised
  • Only the publicKey and chainCode needs to serialised/deserialised
  • Setting this.hdKey can be refactored via a setHdKey method
• this.page and this.unlockedAccount should be included in data serialization
• this.hdPath can be changed via deserialization without triggering the this.setHdPath method
• implementFullBIP44 is incorrectly serialised
  • Should be implementFullBIP44: this.implementFullBIP44 instead of implemntFullBIP44: false
• Some "resetting" of data can be refactored (i.e., see forgetDevice, setHdPath and the constructor)
• Some refactoring for filtering this.accounts can be done
• this.bridgeUrl can be changed via deserialisation without updating the iframe URL
  • This should either be only settable via init, or should trigger iframe deletion and recreation (less desireable)