Bug fix: Electron app does not validate URLs on new windows and navigation

[eniolam1000752]

What was the problem?

This PR resolves #5284

How was it solved?

• Added protocol checks on navigating to an external link

How was it tested?

• Start up the electron app using this command yarn build:electron && yarn start
• Open up the dev console command + shift + i
• Execute this snippet on the console location.href = 'https://lisk.com'
• It would be observed that this link would be opened in default browser
• Try again by executing this snippet on the console location.href = 'http://lisk.com'
• it should be observed that this link would not be navigated to.