DYN-6857 homepage settings refactor

[dnenov]

Purpose

Simplification of the way HomePage settings were serialized as part of the Dynamo Preferences. No longer maintains a Dictionary<string, object> but uses List<string> instead.

Formerly, a workaround was created to serialize a json-serialized version of the Dictionary, as the limitation is that xaml cannot serialize Dictionary types.

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated
• This PR contains no files larger than 50 MB

Release Notes

• no longer serializes to Dictionary, but list of ':' delimited key/value pairs
• adjusted all affected Tests and resources

Reviewers

@QilongTang
@reddyashish

FYIs

[github-actions]

UI Smoke Tests

Test: success. 2 passed, 0 failed.
TestComplete Test Result
Workflow Run: UI Smoke Tests
Check: UI Smoke Tests - net8.0

[github-actions]

See the ticket for this pull request: https://jira.autodesk.com/browse/DYN-6857