Fix missing initialization in PGM_KICAD.

This init was probably removed by mistake.
Fixes #12935
https://gitlab.com/kicad/code/kicad/issues/12935

kicad/kicad.cpp

@@ -172,6 +172,7 @@ bool PGM_KICAD::OnPgmInit()
 
     m_bm.InitSettings( new KICAD_SETTINGS );
     GetSettingsManager().RegisterSettings( PgmSettings() );
+    GetSettingsManager().SetKiway( &Kiway );
     m_bm.Init();
 
     // Add search paths to feed the PGM_KICAD::SysSearch() function,