fix: issue2551347 - make _generic.help.html work without property settings This lets the classhelp() method run in read only mode to provide information on a Link property without updating the property. Updating the property can be done by selecting the proper value using the drop-down. Update classic and minimal templates to allow this to work. Update upgrading and reference docs.

License
=======

Roundup is Free Software under the following license (from the file
COPYING.txt in the software distribution):

.. raw:: html

   <div class="file_insert">

.. include:: ../COPYING.txt

.. raw:: html

   </div>