demo: how to add multiple navigate actions to the gutter icons

[jansorg]

Description

@tednology
I wasn't able to figure out how to create multiple annotations for the same line. But it should work, hopefully :)

Type of Change

• Tech Debt (refactoring, unit tests, CI changes, pre-commit hooks, etc)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

How Has This Been Tested?

Checklist:

• I have added tests for my code
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas

[tednology]

It does work! This is great.