Bug#918946: picard: Crashes when adding action to toolbar in options

[cacatoes@tuxfamily.org]

Package: picard
Version: 2.1.0-1

Hello,

In options, user interface. When I click "add action to toolbar" picard
crashes displaying this message in terminal:

Traceback (most recent call last):
  File "/usr/lib/picard/picard/ui/options/interface.py", line 252, in add_to_toolbar
    selected_action, ok = AddActionDialog.get_selected_action(display_list, self)
  File "/usr/lib/picard/picard/ui/options/interface.py", line 315, in get_selected_action
    dialog = AddActionDialog(action_list, parent)
  File "/usr/lib/picard/picard/ui/options/interface.py", line 296, in __init__
    temp_list.append([_(babel_415_workaround), action])
NameError: name 'temp_list' is not defined
fish: Tâche -1077301452, 'picard' terminée par le signal SIGABRT (Abandon)

Regards,

-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (500, 'testing'), (200, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 4.19.0-1-686-pae (SMP w/2 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8), LANGUAGE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages picard depends on:
ii  libc6                 2.28-2
ii  libchromaprint-tools  1.4.3-3
ii  python3               3.7.1-3
ii  python3-libdiscid     1.0-3+b1
ii  python3-mutagen       1.40.0-2
ii  python3-pyqt5         5.11.3+dfsg-1+b3

picard recommends no packages.

Versions of packages picard suggests:
ii  hicolor-icon-theme  0.17-2

-- no debconf information