Adjusted label color in action bar

[Archie27376]

What it does

Fixes: #10300

The commit alters the color of the next, previous and close labels in the action bar according to the present theme.

How to test

Follow steps to open the Browser:

• yarn browser build
• yarn
• yarn browser start

Open .vscode/settings.json and trigger the command Go To Next Problem

Review checklist

• As an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

• As a reviewer, I agree to behave in accordance with the review guidelines

[msujew]

@Archie27376 thanks that looks already quite good. While you're at this, I have a request. We recently changed the buttons to not transform their size when clicking on them and the monaco buttons do not seem to conform to that decision. Do you mind adding this rule as well?

.monaco-editor .monaco-action-bar .action-item.active {
	transform: none;
}

[msujew]

LGTM thanks!