Metadata fixes

* Fix tags for **VSSDK.ServerExplorer.11** and **VSSDK.ServerExplorer.12**
* Fix target folders for **VSSDK.Debugger.Interop.11** and **VSSDK.Debugger.Interop.12**
* Add missing dependencies for **VSSDK.Shell.12** and **VSSDK.ServerExplorer.12**
* Fix mistakes in comments