track issue title changes (#841)

options/locale/locale_en-US.ini

@@ -549,6 +549,7 @@ issues.remove_milestone_at = `removed this from the <b>%s</b> milestone %s`
 issues.self_assign_at = `self-assigned this %s`
 issues.add_assignee_at = `was assigned by <b>%s</b> %s`
 issues.remove_assignee_at = `removed their assignment %s`
+issues.change_title_at = `changed title from <b>%s</b> to <b>%s</b> %s`
 issues.open_tab = %d Open
 issues.close_tab = %d Closed
 issues.filter_label = Label

options/locale/locale_zh-CN.ini

@@ -506,6 +506,10 @@ issues.remove_label_at = ` %[4]s 删除了标签 <div class="ui label" style="co
 issues.add_milestone_at = ` %[2]s 添加了里程碑 <b>%[1]s</b>`
 issues.change_milestone_at = `%[3]s 修改了里程碑从 <b>%[1]s</b> 到 <b>%[2]s</b>`
 issues.remove_milestone_at = `%[2]s 删除了里程碑 <b>%[1]s</b>`
+issues.self_assign_at = `于 %s 指派给自己`
+issues.add_assignee_at = `于 %[2]s 被 <b>%[1]s</b> 指派`
+issues.remove_assignee_at = `于 %s 取消了指派`
+issues.change_title_at = `于 %[3]s 修改标题 <b>%[1]s</b> 为 <b>%[2]s</b>`
 issues.open_tab=%d 个开启中
 issues.close_tab=%d 个已关闭
 issues.filter_label=标签筛选