[NUI] Access managed fields only when explicit view disposal

Signed-off-by: Jiyun Yang <[email protected]>

src/Tizen.NUI/src/public/BaseComponents/ViewInternal.cs

@@ -1491,14 +1491,14 @@ protected override void Dispose(DisposeTypes type)
 
                 attached?.Clear();
                 attached = null;
+
+                DisConnectFromSignals();
             }
 
             //Release your own unmanaged resources here.
             //You should not access any managed member here except static instance.
             //because the execution order of Finalizes is non-deterministic.
 
-            DisConnectFromSignals();
-
             backgroundExtraDataUpdatedFlag = BackgroundExtraDataUpdatedFlag.None;
 
             LayoutCount = 0;