Improve local password collection

[starbelly]

Closes #256 and #190

• Resolves an issue where by if we accept a local password over 32 bytes we'll crash at key generation time. Instead, we now warn if the password is over 32 chars and prompt the user to try again. On the third attempt we throw a provider error.
• To go along with the above, we now will warn the user if confirmation of a local password does not match the original entered local password vs immediately throwing, instead the user has 3 attempts to correctly confirm.

[starbelly]

I will open up a PR to forward port this to master after this is merged.