The theme includes styles for the spacer block for the front which appears to be unnecessary:
* It adds `display: block` even though that is the default.
* It removes top and bottom margin, even though this is not needed in the post content because of collapsing margins between blocks.
* It uses a custom CSS property to force a specific height on mobile. This affects the patterns in the theme negatively.
It also causes styling problems:
* When the spacer block has a height set to `0` in the navigation block, as the theme forces this to be larger on smaller screens.
* When the block is horizontal. Horizontal was not an option when this style was added.
Consequences of removal:
* Removing the use of the custom CSS property will cause a style change for websites that have adjusted the spacing property.
Follow-up to [49216], [49574].
Props poena, mukesh27.
Fixes#56222.
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