Fix overflow scroll effect visibility when top bar is always visible

[ulusoyca]

Description

When the top bar is set to always visible, the overflow scroll effect from the leading side (top part) will not be visible since the custom scroll view is placed and starts behind the top bar.

This PR adds explicit padding to the custom scroll view when isTopBarLayerAlwaysVisible is set to true.

This is how all the pages look after the fix:

fix_top_bar_glow.mp4

Related Issues

• List not scrolling properly #102

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• I read the Contributor Guide and followed the process outlined there for submitting PRs.
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Breaking Change

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• [-] No, this is not a breaking change.