Fix no js when animations are enabled

[ludoboludo]

PR Summary:

Fix the no-js behaviour for animation so content is showing properly

Why are these changes introduced?

Right now the no js styling is targeting a class that is only added via JS.

What approach did you take?

I replaced the class used by the class that is added in liquid vs JS

Visual impact on existing themes

Should show all section by default properly in no-js.

Testing steps/scenarios

• Enable the animation from the general settings
• Then test the theme after disabling JS in the inspect tool

Demo links

• Store
• Editor

Checklist

• Added PR summary for release notes
• Requested review from UX (Only for changes that are affecting the experience or perceivable visual details)
• Created a ticket for the help.shopify.com documentation team about updates to theme settings. (Internal-only task)
• Followed theme code principles
• Linted with Theme Check
• Tested on mobile
• Tested on multiple browsers
• Tested for accessibility

[kjellr]

Great catch!