Update to ImGui v1.91.6

Update ImPlot
Fix misc compilation errors

Plugins/Cog/Source/CogEngine/Private/CogEngineWindow_Inspector.cpp

@@ -954,12 +954,8 @@ bool FCogEngineWindow_Inspector::HasPropertyAnyChildren(const FProperty* Propert
 {
     if (const FStructProperty* StructProperty = CastField<FStructProperty>(Property))
     {
-        for (TFieldIterator<FProperty> It(StructProperty->Struct); It; ++It)
-        {
-            return true;
-        }
-
-        return false;
+        const TFieldIterator<FProperty> It(StructProperty->Struct);
+        return It ? true : false;
     }
     else if (const FArrayProperty* ArrayProperty = CastField<FArrayProperty>(Property))
     {

Plugins/Cog/Source/CogEngine/Private/CogEngineWindow_NetImGui.cpp

@@ -5,6 +5,8 @@
 #include "CogWindowConsoleCommandManager.h"
 #include "CogWindowManager.h"
 #include "CogWindowWidgets.h"
+#include "Engine/EngineBaseTypes.h"
+#include "Engine/World.h"
 #include "imgui.h"
 #include "imgui_internal.h"
 #include "Misc/CoreMisc.h"