connect button should throw error if metamask extension is not found

[ifebrand6]

• I started the application

• navigated to the voting interface

• clicked on connect wallet

• I didn't get any response as I don't have metamask extension installed

• In such a scenario, I believe an error shown be shown to the user that "metamask extension not found" or the user should be redirected to download metamask extension.
  Sign-in button #151

[David405]

@ifebrand6 as it is now, the error is shown in the console but I will add an alert message or something to notify the user

[Bill-Kunj]

@ifebrand6 as it is now, the error is shown in the console but I will add an alert message or something to notify the user

@David405 This is a good idea.
@jimscarver Is this a requirement for the rv2021 interface?

[David405]

@Bill-Kunj I am rewriting the way signin works, so this wouldn't be an issue