Provide a mechanic to reset InxParameter in Extensions
There is currently no way to define a "real default"-parameter that resets every time an extension dialog is created.
Currently the default-value will only ne aquired on the first run. This value would be overriten with the value stored in preferences.xml after inkscapes restarts. (Also it always takes a tempoary-stored-last-value.)
<param name="tmpString" type="string">"DefaultString"</param>
<group
id="extensions"
{ExtensionID}.{paramName}={LastValue} ...\>
I suggest to add an attribute resetToDefault like this
<param name="tmpString" type="string" resetToDefault="true">"DefaultString"</param>