make suggest channels a feature

include/features.php

@@ -49,6 +49,7 @@ function get_features() {
 			array('personal_tab',   t('Network Personal Tab'),		t('Enable tab to display only Network posts that you\'ve interacted on')),
 			array('new_tab',   		t('Network New Tab'),			t('Enable tab to display all new Network activity')),
 			array('affinity',       t('Affinity Tool'),			    t('Filter stream activity by depth of relationships')),
+			array('suggest',    	t('Suggest Channels'),			t('Show channel suggestions')),
 		),
 
 		// Item tools

include/widgets.php

@@ -57,6 +57,9 @@ function widget_collections($args) {
 
 function widget_suggestions($arr) {
 
+	if((! local_user()) || (! feature_enabled(local_user(),'suggest')))
+		return '';
+
 	require_once('include/socgraph.php');
 
 	$r = suggestion_query(local_user(),get_observer_hash(),0,20);