Hiding Administration Menu Items through remove_menu_page function can create unnecessary margin via the menu separator list item

[monopine]

In some situations where the Administration Menu has had menu items removed, the wp-menu-separator <li> may appear first. When the menu separator <li> appears first in the menu, unwanted extra margin is created.

This issue occurs when the Dashboard menu item has been disabled, but could occur under other menu reorganizations and configurations.

[monopine]

seperator example

[monopine]

For clarification, the Dashboard menu item is hidden through

function remove_menus() {
	remove_menu_page( 'index.php' );
}
add_action( 'admin_menu', 'remove_menus' );

[SergeyBiryukov]

Related: #24104, #26960, #28934.