Catch 'clipboard already open' errors in editors

Apparently following commits have not fixed the problem completely,
because it still happens (although not so often).

changeset: 2019:b8f795bdfe9f
user: Andrey Skvortsov <andrej.skvortzov@gmail.com>
date: Fri May 25 17:40:29 2018 +0300
summary: fix hangs on mouse selection in case if wxPython uses wxWidgets with GTK3+ support

changeset: 2018:5ce6d08ff2c7
user: Andrey Skvortsov <andrej.skvortzov@gmail.com>
date: Fri May 25 17:23:15 2018 +0300
summary: make clipboard open minimal time as wxPython documentation recommends

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#!/usr/bin/env python

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# -*- coding: utf-8 -*-

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# See COPYING.Runtime file for copyrights details.

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LogLevels = ["CRITICAL", "WARNING", "INFO", "DEBUG"]

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LogLevelsCount = len(LogLevels)

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LogLevelsDict = dict(zip(LogLevels, range(LogLevelsCount)))

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LogLevelsDefault = LogLevelsDict["DEBUG"]