'Initialize plugin: connect signals, setup actions, etc.
It must be run at the end of __init__'

def initialize_plugin(self):

    self.create_toggle_view_action()
    self.plugin_actions = self.get_plugin_actions()
    self.sig_show_message.connect(self.show_message)
    self.sig_update_plugin_title.connect(self.update_plugin_title)
    self.sig_option_changed.connect(self.set_option)
    self.setWindowTitle(self.get_plugin_title())
