[FIX] test_themes: patch website switcher template

In [1] when all modules were migrated to the new assets system, the
modules in design themes were forgotten.

This commit puts the owl templates into the correct asset.

[1]: https://github.com/odoo/odoo/commit/5410b7c238f211ced2519e53afc99c8468e1f527

closes odoo/design-themes#596

X-original-commit: 9f579f6400
Signed-off-by: Romain Derie (rde) <rde@odoo.com>
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>

test_themes/__manifest__.py

@@ -45,11 +45,8 @@
     'application': False,
     'post_init_hook': 'post_init_hook',
     'assets': {
-        'web.assets_backend': [
-            'test_themes/static/src/js/systray_items/website_switcher.js',
-        ],
-        'web.assets_qweb': [
-            'test_themes/static/src/js/systray_items/website_switcher.xml',
+        'website.assets_editor': [
+            'test_themes/static/src/systray_items/*',
         ],
     },
     'license': 'LGPL-3',