I18n: remove Window class from message extraction blacklist

Messages from the bpy.types.Window class were blacklisted in the
message extraction script.

This change allows a few new messages to be translated, including at
least two which show up in the UI. There are only 12 new messages in
the .po files, so even if some never need to be translated, that's not
too many.

Ref. T43295

Reviewed By: mont29

Differential Revision: https://developer.blender.org/D15628

release/scripts/modules/bl_i18n_utils/bl_extract_messages.py

@@ -206,8 +206,6 @@ def dump_rna_messages(msgs, reports, settings, verbose=False):
             "Context", "Event", "Function", "UILayout", "UnknownType", "Property", "Struct",
             # registerable classes
             "Panel", "Menu", "Header", "RenderEngine", "Operator", "OperatorMacro", "Macro", "KeyingSetInfo",
-            # window classes
-            "Window",
         )
         }