Fix load/save of research in editor

src/openrct2/Editor.cpp

@@ -358,8 +358,6 @@ namespace Editor
         gGuestChangeModifier = 0;
         if (fromSave)
         {
-            research_populate_list_random();
-
             if (gParkFlags & PARK_FLAGS_NO_MONEY)
             {
                 gParkFlags |= PARK_FLAGS_NO_MONEY_SCENARIO;

src/openrct2/management/Research.cpp

@@ -394,6 +394,12 @@ void research_reset_current_item()
  */
 static void research_insert_unresearched(ResearchItem&& item)
 {
+    // First check to make sure that entry is not already accounted for
+    if (item.Exists())
+    {
+        return;
+    }
+
     gResearchItemsUninvented.push_back(std::move(item));
 }