Fix cAPI Hanging Auth Issue on EDMC Protocol

[Rixxan]

Description

This Pull fixes an additional issue with the new installer and the EDMC:// protocol. This puts in a more preferred handler key to ensure traffic is redirected appropriately. This is a temporary fix, and the next version (5.10.0) should investigate inverting the preference of the EDMC protocol vs local authentication.

Also changes the name of the default shortcut to be clearer.

Fixes #2057, #2058, #2059, #2062

Full Changes:

• Adds additional handler key to Windows registry
• Adds a message box that displays on a successful authentication event.

Type of change

• Bug Fix

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Multiple install runs, clean installs, self-updates, and others made to confirm functionality, including under a variety of existing pre-install situations.
• All PyTest tests pass