fix: minor glitch in markdown ast preview

[amareshsm]

Prerequisites checklist

• I have read the contributing guidelines.

What is the purpose of this pull request?

What changes did you make? (Give an overview)

1. In the Markdown editor, long values were overlapping with their corresponding keys. Added a generic fix to resolve this issue.

Before	After

2. Updated the scrollbar styles for consistent appearance

3. Added horizontal scroll to tree view - fixes Bug: Allow tree view to horizontally scroll #77

Before	After

Related Issues

Is there anything you'd like reviewers to focus on?

I have reviewed the changes myself, and I would request the reviewers to check for any corner cases to ensure that none of the existing styles or functionalities are not affected.

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[harish-sethuraman]

can you resolve conflicts in this PR?

[nzakas]

Ping @amareshsm

[nzakas]

I think we should just scroll the entire right pane horizontally rather than each individual node.

[lumirlumir]

Hi everyone 😄

Is this PR still in progress, or is there anything that needs to be done beforehand?

[github-actions]

Hi everyone, it looks like we lost track of this pull request. Please review and see what the next steps are. This pull request will auto-close in 7 days without an update.

[github-actions]

This pull request was auto-closed due to inactivity. While we wish we could keep working on every request, we unfortunately don't have the bandwidth to continue here and need to focus on other things. You can resubmit this pull request if you would like to continue working on it.