[Plugin: WP PageNavi Style] Top level menu

Well, just for the record, I’m solving this by now using the following code.

(can be used inside the theme’s functions.php, as a plugin or a mu-plugin)

<?php
/* Plugin Name: Move WP PageNavi Styles */
add_action( 'admin_init', 'remove_wp_pagenavi_style' );
add_action( 'admin_menu', 'add_wp_pagenavi_style' );
function remove_wp_pagenavi_style() {
	remove_menu_page('wp-pagenavi-style/wp-pagenavi-style.php');
}
function add_wp_pagenavi_style() {
	add_theme_page('PageNavi Style', 'PageNavi Style', 'install_plugins', 'wp-pagenavi-style/wp-pagenavi-style.php');
}

obs: attention to the install_plugins capability, adjust as desired