As the form GadgetTool_viewPrettyGadgetDialog is not called on the GadgetTool itself, rename it to make it
compliant with the naming convention. Also remove the 'Pretty' word as it has no meaning.

(previous commit seems to partially failed)

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@32222 20353a03-c40f-0410-a6d1-a30d3c3de9de