EXP-1550 FIX -- New tag shown and not removed on click when rezzing an item...

EXP-1550 FIX -- New tag shown and not removed on click when rezzing an item from Received Items panel and taking back into inventory.

* Inventory folder creation dates are now only set once, rather than being
  updated every time a new item is added.

indra/newview/llfolderviewitem.cpp

@@ -2146,8 +2146,14 @@ BOOL LLFolderViewFolder::addItem(LLFolderViewItem* item)
 	
 	item->dirtyFilter();
 
-	// Update the folder creation date if the child is newer than our current date
-	setCreationDate(llmax<time_t>(mCreationDate, item->getCreationDate()));
+	// Update the folder creation date if the folder has no creation date
+	bool setting_date = false;
+	const time_t item_creation_date = item->getCreationDate();
+	if ((item_creation_date > 0) && (mCreationDate == 0))
+	{
+		setCreationDate(item_creation_date);
+		setting_date = true;
+	}
 
 	// Handle sorting
 	requestArrange();
@@ -2157,8 +2163,11 @@ BOOL LLFolderViewFolder::addItem(LLFolderViewItem* item)
 	LLFolderViewFolder* parentp = getParentFolder();
 	while (parentp)
 	{
-		// Update the folder creation date if the child is newer than our current date
-		parentp->setCreationDate(llmax<time_t>(parentp->mCreationDate, item->getCreationDate()));
+		// Update the parent folder creation date
+		if (setting_date && (parentp->mCreationDate == 0))
+		{
+			parentp->setCreationDate(item_creation_date);
+		}
 
 		if (parentp->mSortFunction.isByDate())
 		{