Bug 1571: Resizing of Synchronization checklist window does not stop when mouse button is released

https://winscp.net/tracker/1571

Source commit: ac913ba5ce29686f60653f6a2a943fedc1e61ee9

source/forms/SynchronizeChecklist.cpp

@@ -1064,7 +1064,7 @@ void __fastcall TSynchronizeChecklistDialog::Dispatch(void * Message)
       TForm::Dispatch(Message);
     }
   }
-  if (M->Msg == CM_DPICHANGED)
+  else if (M->Msg == CM_DPICHANGED)
   {
     CMDpiChanged(*M);
   }