Fix for secondary button text not visible in light theme

[balajiv113]

Signed-off-by: Balaji V kuttibalaji.v6@gmail.com

What it does

Fixes #9006

How to test

Follow the steps given in the issue

Review checklist

• as an author, I have thoroughly tested my changes and carefully followed the review guidelines
• Check the changes in multiple themes
• Check that there is no impact in Discussion UI (As this change was introduced as a part of Apply CommentThread vscode Plugin API #8870)

[vince-fugnitto]

@balajiv113 thank you for providing a fix for the styling, do you mind reverting the unnecessary changes (formatting) since it adds noise to the pull-request and makes it more difficult to review. Else, you can group the formatting changes in a secondary commit 👍

[balajiv113]

@vince-fugnitto Grouped the changes into 2 separate commits as mentioned.

[vinokurig]

Tested the scenario from the issue and Pull Requests comments. Works as expected. Thank you @balajiv113

[vince-fugnitto]

@balajiv113 do you mind rebasing the pull-request on the latest master (it should resolve the build errors).

[balajiv113]

@vince-fugnitto Re-based with current master 👍

[vince-fugnitto]

@vince-fugnitto Re-based with current master 👍

Thank you for your contribution, and being responsive :)