Save project settings after Schematic Setup.

This prevents data from getting lost if we later crash.

Fixes #17859

(cherry picked from commit d8d81623)

eeschema/eeschema_config.cpp

@@ -102,6 +102,7 @@ void SCH_EDIT_FRAME::ShowSchematicSetupDialog( const wxString& aInitialPage )
 
         Prj().IncrementTextVarsTicker();
         Prj().IncrementNetclassesTicker();
+        Pgm().GetSettingsManager().SaveProject();
 
         GetRenderSettings()->SetDefaultPenWidth( Schematic().Settings().m_DefaultLineWidth );
         GetRenderSettings()->m_LabelSizeRatio  = Schematic().Settings().m_LabelSizeRatio;