Learn Angular button is clickable even when not visible #52900
Description
Describe the problem that you experienced
In the new angular.dev doc site there is a `Learn Angular` button which is not visible after the first page scroll but stays clickable throughout the main page and obstructs the editor's space and stays on top.
Enter the URL of the topic with the problem
Describe what you were looking for in the documentation
No response
Describe the actions that led you to experience the problem
No response
Describe what you want to experience that would fix the problem
It should be removed from the DOM once the first page scroll is done and not be clickable
Add a screenshot if that helps illustrate the problem
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If this problem caused an exception or error, please paste it here
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If the problem is browser-specific, please specify the device, OS, browser, and version
No response
Provide any additional information here in as much as detail as you can
Instead of changing the opacity to 0, I think we can add an @if/*ngIf condition to show/hide the button