duplicate parameters in save project files when toggling fit

[pkienzle]

Here is a portion of the saved project file (with polydispersity enabled) showing that the parameter list is duplicated in each section that it appears.

Notice that radius.width is tagged as both fitted and not fitted, though the file was saved with fitted checked. An arbitrary number of these can be generated by toggling the "fit" button before saving.

<parameters>
	<parameter error_displayed="True" error_value="1.9763e-05" maximum_displayed="True" maximum_value="inf" minimum_displayed="True" minimum_value="0" name="scale" selected_to_fit="True" unit="" value="0.008855"/>
	<parameter error_displayed="True" error_value="" maximum_displayed="True" maximum_value="inf" minimum_displayed="True" minimum_value="-inf" name="background" selected_to_fit="True" unit="1/cm" value="0.001"/>
	<parameter error_displayed="True" error_value="" maximum_displayed="True" maximum_value="inf" minimum_displayed="True" minimum_value="-inf" name="sld" selected_to_fit="False" unit="1e-6/Ang^2" value="1"/>
	<parameter error_displayed="True" error_value="" maximum_displayed="True" maximum_value="inf" minimum_displayed="True" minimum_value="-inf" name="sld_solvent" selected_to_fit="False" unit="1e-6/Ang^2" value="6"/>
	<parameter error_displayed="True" error_value="3.0197" maximum_displayed="True" maximum_value="inf" minimum_displayed="True" minimum_value="0" name="radius" selected_to_fit="True" unit="Ang" value="2323.5"/>
	<parameter error_displayed="True" error_value="1.9763e-05" maximum_displayed="True" maximum_value="inf" minimum_displayed="True" minimum_value="0" name="scale" selected_to_fit="True" unit="" value="0.008855"/>
	<parameter error_displayed="True" error_value="" maximum_displayed="True" maximum_value="inf" minimum_displayed="True" minimum_value="-inf" name="background" selected_to_fit="True" unit="1/cm" value="0.001"/>
	<parameter error_displayed="True" error_value="" maximum_displayed="True" maximum_value="inf" minimum_displayed="True" minimum_value="-inf" name="sld" selected_to_fit="False" unit="1e-6/Ang^2" value="1"/>
	<parameter error_displayed="True" error_value="" maximum_displayed="True" maximum_value="inf" minimum_displayed="True" minimum_value="-inf" name="sld_solvent" selected_to_fit="False" unit="1e-6/Ang^2" value="6"/>
	<parameter error_displayed="True" error_value="3.0197" maximum_displayed="True" maximum_value="inf" minimum_displayed="True" minimum_value="0" name="radius" selected_to_fit="True" unit="Ang" value="2323.5"/>
</parameters>
<str_parameters/>
<orientation_parameters/>
<dispersity_parameters/>
<fixed_param>
	<parameter error_displayed="None" error_value="None" maximum_displayed="None" maximum_value="None" minimum_displayed="None" minimum_value="None" name="radius.npts" selected_to_fit="None" unit="None" value="35"/>
	<parameter error_displayed="None" error_value="None" maximum_displayed="None" maximum_value="None" minimum_displayed="None" minimum_value="None" name="radius.nsigmas" selected_to_fit="None" unit="None" value="3"/>
	<parameter error_displayed="None" error_value="None" maximum_displayed="None" maximum_value="None" minimum_displayed="None" minimum_value="None" name="radius.npts" selected_to_fit="None" unit="None" value="35"/>
	<parameter error_displayed="None" error_value="None" maximum_displayed="None" maximum_value="None" minimum_displayed="None" minimum_value="None" name="radius.nsigmas" selected_to_fit="None" unit="None" value="3"/>
</fixed_param>
<fittable_param>
	<parameter error_displayed="True" error_value="" maximum_displayed="True" maximum_value="" minimum_displayed="True" minimum_value="" name="radius.width" selected_to_fit="False" unit="" value="0"/>
	<parameter error_displayed="True" error_value="" maximum_displayed="True" maximum_value="" minimum_displayed="True" minimum_value="" name="radius.width" selected_to_fit="True" unit="" value="0"/>
</fittable_param>