Created Issue: A bug when using XAML module catalog in WPF [9906]

When I write __... Ref="file://MyFile.dll" ....__ in my XAML module catalog, the __MefFileModuleTypeLoader__ returns __"yFile.dll"__ instead of __"MyFile.dll"__ .

In project __Prism.MefExtensions.Desktop__ , file __Modularity\MefFileModuleTypeLoader.Desktop.cs__ Line __105__
```
string path = moduleInfo.Ref.Substring(RefFilePrefix.Length + 1);
```
It should be changed to:
```
string path = moduleInfo.Ref.Substring(RefFilePrefix.Length);
```
In project __Prism.Desktop__ , file __Modularity\FileModuleTypeLoader.Desktop.cs__ Line __133__
```
string path = moduleInfo.Ref.Substring(RefFilePrefix.Length + 1);
```
It should be changed to:
```
string path = moduleInfo.Ref.Substring(RefFilePrefix.Length);
```