fix problem running PLCOpenEditor

$ ./PLCOpenEditor.py
../src/common/stdpbase.cpp(62): assert "traits" failed in Get(): create wxApp before calling this

Regression was introduced by '3311eea' (clean-up: fix PEP8 E402 module level import not at top of file)

     1

<?xml version="1.0" encoding="UTF-8"?>

     2

<BeremizRoot URI_location="LOCAL://">

     3

  <TargetType/>

     4

</BeremizRoot>