Per-Monitor Awareness support

[PhilJollans]

The error reported here occurs with AnkhSVN.

There is more information here.

If anybody is using this version of AnkhSVN, and finds that the tool windows are blank, it is necessary to disable per-monitor awareness in VS under Tools -> Options -> General -> 'Optimize rendering for screens with different pixel densities'.

[rhuijben]

See slightly more local fix in https://github.com/ampscm/AnkhSVN There should be a cleaner way via the VS DPI Awareness api, but it doesn't appear to be called the way it is documented. (VS should ask toolwindows how they want to be handled via an optional interface)