[DYN-2827] Added Show/Hide spaces and tabs option for Python script editor.

[zeusongit]

Purpose

[DYN-2827]
Add a global setting option Show Python Editor Whitespace Characters.
Show/Hide spaces and tabs in python script editor
Preserve setting in preferences.
Add Tests

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

Reviewers

@DynamoDS/dynamo

[mjkkirschner]

I think we can make the textEditor options on DynamoViewModel internal.

[QilongTang]

LGTM

[mjkkirschner]

If it still functions after your latest changes - LGTM

[zeusongit]

I am able to access the members after making them internal, and the script editor works fine.
Will merge.
Thank you for the review.

[QilongTang]

@zeusongit Did you forgot to merge or waiting for the PR checks?

[zeusongit]

@QilongTang Was waiting for the self serve, which just completed, merging.