fix clearing project name on opening project properties page.

The problem exists only on Windows with wxPython-3.0.

This happens because callback for EVT_KILL_FOCUS for a first text
control (project name) is called just after creating page with project
properties. It happens before initializing text controls from PLCController.

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These classes are intended for use server-side.

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e.g. in a django view.py :

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    from pyjs.jsonrpc.django import JSONService, jsonremote

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    jsonservice = JSONRPCService()

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    @jsonremote(jsonservice)

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    def test(request, echo_param):

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         return "echoing the param back: %s" % echo_param

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