fix bug in mapping nested options in set_command_option

In case of nested options (eg: estimation.moments_posterior_density.indicator) the syntax: options_.(gui_auxiliary.command_option_mapping(name)) failed to populate the options_ field.

src/+gui_auxiliary/set_command_option.m

@@ -115,7 +115,12 @@ try
             end
             
         otherwise
-            options_.(gui_auxiliary.command_option_mapping(name)) = value;
+            if isnumeric(value)
+                eval(['options_.' gui_auxiliary.command_option_mapping(name) '=' num2str(value) ';']);
+            else
+                eval_expr = sprintf("options_.%s='%s';", gui_auxiliary.command_option_mapping(name), value);
+                eval(eval_expr);
+            end
     end
 catch
     status = 0;