Shiny install/updates for plugins

gistfile1.txt

public function style_and_scripts() {
  ...
  wp_enqueue_style( 'plugin-install' );
  wp_enqueue_script( 'plugin-install' );
  wp_enqueue_script( 'updates' );
  ...
}

public function create_action_link( $state, $slug ) {

			switch ( $state ) {
				case 'install':
					return wp_nonce_url(
						add_query_arg(
							array(
								'action' => 'install-plugin',
								'plugin' => $slug
							),
							network_admin_url( 'update.php' )
						),
						'install-plugin_' . $slug
					);
					break;
				case 'deactivate':
					return add_query_arg( array(
						'action'        => 'deactivate',
						'plugin'        => rawurlencode( $slug . '/' . $slug . '.php' ),
						'plugin_status' => 'all',
						'paged'         => '1',
						'_wpnonce'      => wp_create_nonce( 'deactivate-plugin_' . $slug . '/' . $slug . '.php' ),
					), network_admin_url( 'plugins.php' ) );
					break;
				case 'activate':
					return add_query_arg( array(
						'action'        => 'activate',
						'plugin'        => rawurlencode( $slug . '/' . $slug . '.php' ),
						'plugin_status' => 'all',
						'paged'         => '1',
						'_wpnonce'      => wp_create_nonce( 'activate-plugin_' . $slug . '/' . $slug . '.php' ),
					), network_admin_url( 'plugins.php' ) );
					break;
			}
		}