Input credentials disappears

1. Describe the bug
When entering username and password credentials, the input box disappears if it looses focus. This makes it hard to copy/paste both username and password.

This is the same issue as #4861

2. To Reproduce
Steps to reproduce the behavior:

1. Open an AL workspace
2. Add a launch target with UserPassword authentication
3. Download symbols or launch the app to trigger the credentials input box
4. Try to copy values from notepad, or anywhere else
5. Input box disappears

3. Expected behavior
Keep both input boxes open when they lose focus.

4. Actual behavior
Both input boxes disappear.

5. Versions:

• AL Language: 8.4.586670
• Visual Studio Code: 1.65.2
• Business Central: 19.5
• List of Visual Studio Code extensions that you have installed:
  • AL Language

Final Checklist

Please remember to do the following:

• Search the issue repository to ensure you are reporting a new issue

• Reproduce the issue after disabling all extensions except the AL Language extension

• Simplify your code around the issue to better isolate the problem

Reproduce the issue from an AL workspace by adding a launch target with UserPassword authentication, then triggering symbol download or launch and moving focus away from the credentials inputs. Start by tracing the AL Language extension's credentials input entry point; done means both username and password boxes remain open when they lose focus, including during copy/paste.