Test on XP

[cztomczak]

Use Microsoft's free virtual machines:
https://dev.windows.com/en-us/microsoft-edge/tools/vms/windows/

[cztomczak]

CEF crashed on Win XP, upstream issue here: https://bitbucket.org/chromiumembedded/cef/issues/1787

The solution is to copy dbghelp.dll next to executable. Chrome 47.1 release is now being prepared, see the download wiki page.

CEF with Chrome 49 will be the last version to support Windows XP