WP_Themes_List_Table::prepare_items

	public function prepare_items() {
		$themes = wp_get_themes( array( 'allowed' => true ) );

		if ( ! empty( $_REQUEST['s'] ) ) {
			$this->search_terms = array_unique( array_filter( array_map( 'trim', explode( ',', strtolower( wp_unslash( $_REQUEST['s'] ) ) ) ) ) );
		}

		if ( ! empty( $_REQUEST['features'] ) ) {
			$this->features = $_REQUEST['features'];
		}

		if ( $this->search_terms || $this->features ) {
			foreach ( $themes as $key => $theme ) {
				if ( ! $this->search_theme( $theme ) ) {
					unset( $themes[ $key ] );
				}
			}
		}

		unset( $themes[ get_option( 'stylesheet' ) ] );
		WP_Theme::sort_by_name( $themes );

		$per_page = 36;
		$page     = $this->get_pagenum();

		$start = ( $page - 1 ) * $per_page;

		$this->items = array_slice( $themes, $start, $per_page, true );

		$this->set_pagination_args(
			array(
				'total_items'     => count( $themes ),
				'per_page'        => $per_page,
				'infinite_scroll' => true,
			)
		);
	}