Lifetime Members Referral Code

I am a Lifetime Member and would be nice if everyone I onboard would have me as their referrer. I know it is possible. Maybe a Referrer Field when creating accounts? This would encourage more LTMs to onboard new members using the Mobile App.

No file, test, or entry point is named. Start by locating the mobile account-creation flow and checking how BitShares supports referrers, then clarify whether the referral should be selected during onboarding and how it is verified. Done should include an agreed referral behavior for accounts created through the app.

Written by the indexing model from the issue text.