Fixes #1964 Adding notice to wallet about Stacks Wallet
Fixes #1964 Adding notice to wallet about Stacks Wallet

Signed-off-by: Mary Anthony <5665331b9b819ac358165f8c38970dc8c7ddb47d@blockstack.com>

blockstack/blockstack-portal,blockstack/blockstack-portal,blockstack/blockstack-browser,blockstack/blockstack-portal,blockstack/blockstack-browser,blockstack/blockstack-browser,blockstack/blockstack-browser,blockstack/blockstack-portal,blockstack/blockstack-portal,blockstack/blockstack-browser,blockstack/blockstack-browser