demo: preferred package

demo/LazDesignerForm/demodesignerform1.lpi

@@ -26,6 +26,7 @@
     <RequiredPackages>
       <Item>
         <PackageName Value="Fresnel"/>
+        <DefaultFilename Value="../../src/fresnel.lpk" Prefer="True"/>
       </Item>
       <Item>
         <PackageName Value="LCL"/>