L10N: Get translations from correct module

The _ from spyder.config.base gets translations from the spyder module,
while we need to get them from the spyder_notebook module.

spyder_notebook/notebookplugin.py

@@ -17,14 +17,14 @@
 
 # Spyder imports
 from spyder.api.plugins import SpyderPluginWidget
-from spyder.config.base import _
 from spyder.config.gui import is_dark_interface
 from spyder.utils import icon_manager as ima
 from spyder.utils.qthelpers import (create_action, create_toolbutton,
                                     add_actions, MENU_SEPARATOR)
 from spyder.utils.switcher import shorten_paths
 
 # Local imports
+from spyder_notebook.utils.localization import _
 from spyder_notebook.utils.servermanager import ServerManager
 from spyder_notebook.widgets.notebooktabwidget import NotebookTabWidget
 from spyder_notebook.widgets.serverinfo import ServerInfoDialog

spyder_notebook/utils/localization.py

@@ -0,0 +1,9 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (c) Spyder Project Contributors
+# Licensed under the terms of the MIT License
+
+"""Localization utility function."""
+
+from spyder.config.base import get_translation
+_ = get_translation('spyder_notebook')

spyder_notebook/widgets/client.py

@@ -25,12 +25,13 @@
 import requests
 
 # Spyder imports
-from spyder.config.base import _, get_image_path, get_module_source_path
+from spyder.config.base import get_image_path, get_module_source_path
 from spyder.utils.qthelpers import add_actions
 from spyder.utils import sourcecode
 from spyder.widgets.findreplace import FindReplace
 
 # Local imports
+from spyder_notebook.utils.localization import _
 from spyder_notebook.widgets.dom import DOMWidget
 
 # -----------------------------------------------------------------------------

spyder_notebook/widgets/notebooktabwidget.py

@@ -20,11 +20,11 @@
 import nbformat
 
 # Spyder imports
-from spyder.config.base import _
 from spyder.utils.programs import get_temp_dir
 from spyder.widgets.tabs import Tabs
 
 # Local imports
+from spyder_notebook.utils.localization import _
 from spyder_notebook.widgets.client import NotebookClient
 
 

spyder_notebook/widgets/serverinfo.py

@@ -15,10 +15,10 @@
     QPushButton, QTextEdit, QVBoxLayout)
 
 # Spyder imports
-from spyder.config.base import _
 from spyder.plugins.variableexplorer.widgets.basedialog import BaseDialog
 
 # Local imports
+from spyder_notebook.utils.localization import _
 from spyder_notebook.utils.servermanager import ServerProcess, ServerState