'Open file list management dialog box.'

def open_fileswitcher(self, symbol=False):

    if ((self.fileswitcher is not None) and self.fileswitcher.is_visible):
        self.fileswitcher.hide()
        self.fileswitcher.is_visible = False
        return
    if symbol:
        self.fileswitcher.plugin = self.editor
    else:
        self.fileswitcher.set_search_text('')
    self.fileswitcher.setup()
    self.fileswitcher.show()
    self.fileswitcher.is_visible = True
