(Bug) NoWeb3 screen flashes

[gabitoesmiapodo]

Warning is briefly displayed even if wallet installed and logged in https://www.useloom.com/share/744994a83e6143789791a2b12f855324

Originally posted by @dennis00010011b in https://github.com/poanetwork/token-wizard/pull/1217#issuecomment-436748318

How to

• At the home page click "New crowdsale"
• You well see the "NoWeb3" screen flashing briefly.
• The same thing happens if you refresh on any step.