SL-17036 update menu item similar to NavMesh icon

indra/newview/lllocationinputctrl.h

@@ -109,6 +109,8 @@ public:
 	LLLineEditor*			getTextEntry() const { return mTextEntry; }
 	void					handleLoginComplete();
 
+    bool isNavMeshDirty() { return mIsNavMeshDirty; }
+
 private:
 
 	enum EParcelIcon

indra/newview/llnavigationbar.cpp

@@ -733,3 +733,8 @@ int LLNavigationBar::getDefFavBarHeight()
 {
 	return mDefaultFpRect.getHeight();
 }
+
+bool LLNavigationBar::isRebakeNavMeshAvailable()
+{
+    return mCmbLocation->isNavMeshDirty();
+}

indra/newview/llnavigationbar.h

@@ -102,6 +102,8 @@ public:
 
 	int getDefNavBarHeight();
 	int getDefFavBarHeight();
+
+    bool isRebakeNavMeshAvailable();
 	
 private:
 	// the distance between navigation panel and favorites panel in pixels

indra/newview/llviewermenu.cpp

@@ -94,6 +94,7 @@
 #include "llmarketplacefunctions.h"
 #include "llmenuoptionpathfindingrebakenavmesh.h"
 #include "llmoveview.h"
+#include "llnavigationbar.h"
 #include "llparcel.h"
 #include "llrootview.h"
 #include "llsceneview.h"
@@ -5331,12 +5332,10 @@ class LLToolsEnablePathfindingRebakeRegion : public view_listener_t
 	{
 		bool returnValue = false;
 
-		if (LLPathfindingManager::getInstance() != NULL)
-		{
-			LLMenuOptionPathfindingRebakeNavmesh *rebakeInstance = LLMenuOptionPathfindingRebakeNavmesh::getInstance();
-			returnValue = (rebakeInstance->canRebakeRegion() &&
-				(rebakeInstance->getMode() == LLMenuOptionPathfindingRebakeNavmesh::kRebakeNavMesh_Available));
-		}
+        if (LLNavigationBar::instanceExists())
+        {
+            returnValue = LLNavigationBar::getInstance()->isRebakeNavMeshAvailable();
+        }
 		return returnValue;
 	}
 };