Adding ScrollTo support for Models

[geraldglynn]

Description

Added onLoad functions and tweaked an onToggle function in the following files:
src/core/components/models.jsx
src/core/components/model-collapse.jsx
src/core/components/model-wrapper.jsx

Motivation and Context

We would like ScrollTo to work for Models for when the SpecPath is in the URL Fragment (hash)

How Has This Been Tested?

This has been tested by overriding the component using the plugin architecture in our system.

Manual tests by our QA team

Screenshots (if appropriate):

Checklist

My PR contains...

• No code changes (src/ is unmodified: changes to documentation, CI, metadata, etc.)
• Dependency changes (any modification to dependencies in package.json)
• Bug fixes (non-breaking change which fixes an issue)
• Improvements (misc. changes to existing features)
• Features (non-breaking change which adds functionality)

My changes...

• are breaking changes to a public API (config options, System API, major UI change, etc).
• are breaking changes to a private API (Redux, component props, utility functions, etc.).
• are breaking changes to a developer API (npm script behavior changes, new dev system dependencies, etc).
• are not breaking changes.

Documentation

• My changes do not require a change to the project documentation.
• My changes require a change to the project documentation.
• If yes to above: I have updated the documentation accordingly.

Automated tests

• My changes can not or do not need to be tested.
• My changes can and should be tested by unit and/or integration tests.
• If yes to above: I have added tests to cover my changes.
• If yes to above: I have taken care to cover edge cases in my tests.
• All new and existing tests passed.

^ I'm not 100% sure about Documentation & Tests, please let me know otherwise

[mdhtr]

@geraldglynn @tim-lai

I might have had the wrong assumption about what this feature does (so also referencing it as the earlier version of my PR could have been wrong).

How do I make this feature work in the UI?

I wanted to try out if it is doing what I would expect it to do but couldn't make it work. Clicking a model name does not put the fragment in the URL and I couldn't come up with an URL fragment that would scroll to the specific model. I tried #/models/Category, #model/Category and #/model-Category (which is the id in the HTML) but neither of them resulted in scrolling to the Category model in the petstore.

[zorbash]

@geraldglynn [documentation request] Can you please provide an example of how this feature can be used?