Modify display of settings so seed is never printed or logged

[thesimplekid]

No description provided.

[mubarak23]

is this something you are working on or i should give a crack on this,

if i understand the issue correctly we are trying to remove any log or print statement that show setting seed data.

@thesimplekid

[thesimplekid]

You can work on it. We just need to impl custom Display and Debug traits on the structs that have the mnemonic, and instead of printing the mnemonic just print a place holder.