Finds the **Script_Editor_tabWidget** Widget tab associated to the given file.

        :param file: File to search tab for.
        :type file: unicode
        :return: Tab index.
        :rtype: Editor

def find_editor_tab(self, file):
        """
        Finds the **Script_Editor_tabWidget** Widget tab associated to the given file.

        :param file: File to search tab for.
        :type file: unicode
        :return: Tab index.
        :rtype: Editor
        """

        for i in range(self.Script_Editor_tabWidget.count()):
            if not self.get_widget(i).file == file:
                continue

            LOGGER.debug("> File '{0}': Tab index '{1}'.".format(file, i))
            return i