fix accidental client-side invocation of post history controls if it was disabled via ACP

public/src/client/topic/diffs.js

@@ -4,6 +4,10 @@ define('forum/topic/diffs', ['forum/topic/images', 'benchpress', 'translator'],
 	var Diffs = {};
 
 	Diffs.open = function (pid) {
+		if (!config.enablePostHistory) {
+			return;
+		}
+
 		var localeStringOpts = { year: 'numeric', month: 'short', day: 'numeric', hour: 'numeric', minute: 'numeric' };
 
 		socket.emit('posts.getDiffs', { pid: pid }, function (err, timestamps) {
@@ -49,6 +53,10 @@ define('forum/topic/diffs', ['forum/topic/images', 'benchpress', 'translator'],
 	};
 
 	Diffs.load = function (pid, since, postContainer) {
+		if (!config.enablePostHistory) {
+			return;
+		}
+
 		socket.emit('posts.showPostAt', { pid: pid, since: since }, function (err, data) {
 			if (err) {
 				return app.alertError(err.message);

public/src/client/topic/postTools.js

@@ -140,10 +140,12 @@ define('forum/topic/postTools', [
 			}
 		});
 
-		postContainer.on('click', '[component="post/view-history"], [component="post/edit-indicator"]', function () {
-			var btn = $(this);
-			diffs.open(getData(btn, 'data-pid'));
-		});
+		if (config.enablePostHistory) {
+			postContainer.on('click', '[component="post/view-history"], [component="post/edit-indicator"]', function () {
+				var btn = $(this);
+				diffs.open(getData(btn, 'data-pid'));
+			});
+		}
 
 		postContainer.on('click', '[component="post/delete"]', function () {
 			var btn = $(this);