Allow to define default value for translation propagation

Fixes #940
Signed-off-by: Michal Čihař <michal@cihar.com>

docs/admin/config.rst

@@ -173,6 +173,18 @@ Default commiter name when creating translation component (see
 
 .. seealso:: :setting:`DEFAULT_COMMITER_EMAIL`, :ref:`component`
 
+.. setting:: DEFAULT_TRANSLATION_PROPAGATION
+
+DEFAULT_TRANSLATION_PROPAGATION
+-------------------------------
+
+.. versionadded:: 2.5
+
+Default setting for translation propagation (see :ref:`component`), 
+defaults to ``True``.
+
+.. seealso:: :ref:`component`
+
 .. setting:: ENABLE_AVATARS
 
 ENABLE_AVATARS

weblate/appsettings.py

@@ -232,6 +232,9 @@ DEFAULT_COMMITER_EMAIL = getvalue(
 DEFAULT_COMMITER_NAME = getvalue(
     'DEFAULT_COMMITER_NAME', 'Weblate'
 )
+DEFAULT_TRANSLATION_PROPAGATION = getvalue(
+    'DEFAULT_TRANSLATION_PROPAGATION', True
+)
 
 # Obsolete configs, needed for data migration
 GIT_ROOT = getvalue('GIT_ROOT', os.path.join(BASE_DIR, 'repos'))

weblate/trans/models/subproject.py

@@ -58,6 +58,7 @@ from weblate.appsettings import (
     POST_ADD_SCRIPT_CHOICES,
     HIDE_REPO_CREDENTIALS,
     DEFAULT_COMMITER_EMAIL, DEFAULT_COMMITER_NAME,
+    DEFAULT_TRANSLATION_PROPAGATION,
 )
 from weblate.accounts.models import notify_merge_failure, get_author_name
 from weblate.trans.models.changes import Change
@@ -290,7 +291,7 @@ class SubProject(models.Model, PercentMixin, URLMixin, PathMixin):
     )
     allow_translation_propagation = models.BooleanField(
         verbose_name=ugettext_lazy('Allow translation propagation'),
-        default=True,
+        default=DEFAULT_TRANSLATION_PROPAGATION,
         db_index=True,
         help_text=ugettext_lazy(
             'Whether translation updates in other components '