HighDpi and multimonitor support

[generalloki]

In this section we collect all issues related to high dpi and multi monitor support

• We need to test UI with high dpi display and with two displays with different dpi
• We need to support SVG. As an alternative to providing multiple versions of the bitmaps, it is possible to use a single SVG image and create the bitmap bundle using either wxBitmapBundle::FromSVG() or wxBitmapBundle::FromSVGFile().
• wxDisplay::GetPPI(),
• wxDPIChangedEvent
• https://docs.wxwidgets.org/3.2/overview_high_dpi.html
• WinForms.Graphics DpiX, DpiY; //float
• wxDisplay
• FIXED: Debug message in src/msw/window.cpp: wxLogDebug("Using possibly wrong DPI for %s", wxDumpWindow(this));

[generalloki]

I am closing this issues as almost all things are implemented. The rest (DPIChangedEvent) is in #110.