beremiz

fix deprecation warnings about accessing properties m_x, m_y of wxKeyEvent

/home/beremiz/beremiz/controls/PouInstanceVariablesPanel.py:354: wxPyDeprecationWarning: Accessing deprecated property.
event.m_x = size.width / 2
.project
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^tests/.*/build$
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^.*\.pyc$
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^.*~$
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^.*\.swp$