fix translation strings with multiple parameters


this fixes a lot of warnings given by msgmerge:

../PLCOpenEditor.py:196: warning: 'msgid' format string with unnamed arguments cannot be properly localized:
The translator cannot reorder the arguments.
Please consider using a format string with named arguments,

Beremiz's user manual
=====================

Contents:

.. toctree::
   :maxdepth: 2

   install
   start
   edit
   build
   connectors
   debug