More link for WP Idea Stream < 2.3.0

wp-idea-stream-custom.php

<?php
/**
 * Build a custom more link for Ideas
 *
 * This is to be used with WP Idea Stream < 2.3.0
 *
 * @param  string $more
 * @return string the more link
 */
function to_use_till_you_upgraded_to_WP_4_4_and_WP_Idea_Stream_2_3( $more = '' ) {
	if ( ! wp_idea_stream_is_idea_archive() ) {
		return $more;
	}

	return '&hellip; <a href="' . wp_idea_stream_ideas_get_permalink() . '" class="more-link">Continue reading &rarr;</a>';
}
add_filter( 'excerpt_more', 'to_use_till_you_upgraded_to_WP_4_4_and_WP_Idea_Stream_2_3', 20, 1 );