account deletion throws error

Versions

• OS: Debian GNU/Linux bullseye/sid
• GTK Version: 3.24.24
• PyGObject Version: 3.38.0
• GLib Version : 2.66.2
• python-nbxmpp Version: 2.0.0
• Gajim Version: 1.3.0-beta2

Traceback

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/gajim/gtk/remove_account.py", line 114, in _on_button_clicked
    self._on_remove()
  File "/usr/lib/python3/dist-packages/gajim/gtk/remove_account.py", line 145, in _on_remove
    self.show_page('success')
  File "/usr/lib/python3/dist-packages/gajim/gtk/assistant.py", line 129, in show_page
    self._set_buttons_visible(buttons)
  File "/usr/lib/python3/dist-packages/gajim/gtk/assistant.py", line 143, in _set_buttons_visible
    button, _ = self._buttons[button_name]
KeyError: 'close'

Steps to reproduce the problem

Happens every time you delete an account.