Portrait mode for inventory screen

src/MenuManager.h

@@ -138,6 +138,8 @@ namespace ZL {
 		void rebuildChatBubblesFromHistory(int chatIndex, bool isPortrait);
 		void showModalMenuScreen();
 
+		void openPortraitInventoryItem(int index);
+		void closePortraitInventoryItem();
 		void openPortraitQuestJournalItem(int index);
 		void closePortraitJournalItem();
 
@@ -170,6 +172,7 @@ namespace ZL {
 		Inventory* inventory = nullptr;
 		int inventorySelectedIndex_ = -1;
 
+		int inventoryMenuStackDepth_ = 0;
 		int selectedQuestIndex = -1;
 		int journalMenuStackDepth_ = 0;
 		std::vector<std::string> visibleQuestIds;
@@ -235,6 +238,8 @@ namespace ZL {
 
 
 		std::shared_ptr<UiNode> newInventoryRoot;
+		std::shared_ptr<UiNode> portraitInventoryListRoot;
+		std::shared_ptr<UiNode> portraitInventoryItemRoot;
 		std::shared_ptr<UiNode> questJournalRoot;
 		std::shared_ptr<UiNode> portraitQuestJournalListRoot;
 		std::shared_ptr<UiNode> portraitQuestJournalItemRoot;