Enable translation in Python modules

- covers all the remaining Python modules
 - most only get a translatable pretty name, some also return
   error messages

src/modules/initramfscfg/main.py

@@ -8,7 +8,7 @@
 #   Copyright 2016, David McKinney <mckinney@subgraph.com>
 #   Copyright 2016, Kevin Kofler <kevin.kofler@chello.at>
 #   Copyright 2017, Alf Gaida <agaida@siduction.org>
-#   Copyright 2017, Adriaan de Groot <groot@kde.org>
+#   Copyright 2017, 2019, Adriaan de Groot <groot@kde.org>
 #
 #   Calamares is free software: you can redistribute it and/or modify
 #   it under the terms of the GNU General Public License as published by
@@ -30,6 +30,17 @@ import os
 import shutil
 
 
+import gettext
+_ = gettext.translation("calamares-python",
+                        localedir=libcalamares.utils.gettext_path(),
+                        languages=libcalamares.utils.gettext_languages(),
+                        fallback=True).gettext
+
+
+def pretty_name():
+    return _("Configuring initramfs.")
+
+
 def copy_initramfs_hooks(partitions, root_mount_point):
     """
     Copies initramfs hooks so they are picked up by update-initramfs