Adhere to more modern BankID recommendations for opening in mobile device

[urizen-source]

PR fixes #533

We have been able to reproduce issue with Edge+Intune that are security restricted, this fixes the issue. It also emulates the behaviour we see on test.bankid.com and follows the BankID documentation. If I understand correctly, the No such orders is when it thinks it has created a request to BankID(using bankid://) but it has been blocked, so a cancel or other action without a real order gives the "no such order" message.

Stops use of bankid:// on mobile devices that are often security restricted. Instead uses the https://app.bankid.com,
Source: https://developers.bankid.com/getting-started/autostart
Quote: "To open the Mobile BankID app from a browser on a mobile device, you should use unversal links for iOS and app links for Android. "

Displays fallback button by default on mobile devices:
Source: https://developers.bankid.com/resources/ui-guide-mobile
Quote: "4. Promt user to open BankID. The BankID app should be opened automatically using autostart. However, in case this fails for some reason, the user should be asked to open the app manually."

[elinohlsson]

@urizen-source This is not really related to #508 as we discoursed earlier. It is related to launching the BankID security application, the latter part of your PR description. Could you add an issue which describes the problem and link it to this PR?

[urizen-source]

Issue created, link from this updated.