ability to set maximum related topics rendered in ACP

src/topics/tags.js

@@ -324,7 +324,9 @@ module.exports = function(Topics) {
 	};
 
 	Topics.getRelatedTopics = function(topicData, callback) {
-		if (!topicData.tags.length) {
+		var maximumTopics = typeof meta.config.maximumRelatedTopics !== 'undefined' ? parseInt(meta.config.maximumRelatedTopics, 10) : 5;
+
+		if (!topicData.tags.length || maximumTopics === 0) {
 			return callback(null, topicData);
 		}
 
@@ -353,7 +355,7 @@ module.exports = function(Topics) {
 					});
 				}
 
-				related = _.shuffle(related).slice(0, 5);
+				related = _.shuffle(related).slice(0, maximumTopics);
 
 				topicData.related = related;
 				callback(err, topicData);

src/views/admin/settings/tags.tpl

@@ -31,4 +31,15 @@
 	</div>
 </div>
 
+<div class="row">
+	<div class="col-sm-2 col-xs-12 settings-header">Related Topics</div>
+	<div class="col-sm-10 col-xs-12">
+		<form>
+			<div class="form-group">
+				<label for="maximumRelatedTopics">Maximum related topics to display (if supported by theme)</label>
+				<input id="maximumRelatedTopics" type="text" class="form-control" value="5" data-field="maximumRelatedTopics">
+			</div>
+	</div>
+</div>
+
 <!-- IMPORT admin/settings/footer.tpl -->