Eeschema: Add Cairo printing to the Eeschema print engine. The current print engine (using wxDC draw engine) has frequently issues with each new wxWidgets version. Cairo printing engine, used for Pcbnew and Gerbview has less issues. On Eeschema, the cairo print is enabled only if the advanced config has the option "EnableEeschemaPrintCairo = 1"

common/render_settings.cpp

@@ -45,6 +45,7 @@ RENDER_SETTINGS::RENDER_SETTINGS() :
     m_defaultPenWidth       = 0;
     m_minPenWidth           = 0;
     m_isPrinting            = false;
+    m_printBlackAndWite     = false;
 }