Fixing dialogues and cutscenes, minor bug fixing

src/MenuManager.h

@@ -70,7 +70,7 @@ namespace ZL {
 
 		void tutorialShowTaxiHint();
 
-		void setChatUnread(int chatIndex, bool unread);
+		void setChatUnread(int chatIndex, bool unread, const std::string& previewMsg = "");
 
 		void spendMoney(int amount);
 		int  getMoney() const { return money_; }
@@ -229,6 +229,7 @@ namespace ZL {
 		std::vector<std::string> visibleQuestIds;
 
 		bool chatUnread_[3] = { true, true, true };
+		std::string chatPreviewMsg_[3];  // empty = keep JSON hardcoded text
 		int  money_ = 5500;
 
 		// Phone chat state