don't clear all variables in workspace when closing gui: only clear gui variables

src/dynare_gui.m

@@ -228,7 +228,8 @@ fns = fieldnames(appdata);
 for ii = 1:numel(fns)
     rmappdata(0,fns{ii});
 end
-evalin('base','clear');
+clear('global', 'project_info')
+clear('global', 'model_settings')
 close force
 end