Fix template conflict in XSLT with lxml>=4.9.0 again

Earlier attempt was fixing conflict with -1.0 priority attribute,
as a side effect of such low priority, SFC Actions were not
editable anymore.

This time move template around instead of using explicit priority.

<?xml version="1.0" encoding="UTF-8"?>
<BaseParams Name="py_ext_0" IEC_Channel="0"/>