Disable escaping for email subject

Fixes #937
Signed-off-by: Michal Čihař <michal@cihar.com>

weblate/html/mail/activation_subject.txt

-{% load i18n %}{% load translations %}{% blocktrans %}Your registration on {{ site_title }}{% endblocktrans %}
+{% load i18n %}
+{% load translations %}
+{% autoescape off %}
+{% blocktrans %}Your registration on {{ site_title }}{% endblocktrans %}
+{% endautoescape %}

weblate/html/mail/changed_translation_subject.txt

-{% load i18n %}{% blocktrans %}Changed translation in {{ translation }}{% endblocktrans %}
+{% load i18n %}
+{% autoescape off %}
+{% blocktrans %}Changed translation in {{ translation }}{% endblocktrans %}
+{% endautoescape %}

weblate/html/mail/merge_failure_subject.txt

-{% load i18n %}{% blocktrans %}Merge failure in {{ subproject }}{% endblocktrans %}
+{% load i18n %}
+{% autoescape off %}
+{% blocktrans %}Merge failure in {{ subproject }}{% endblocktrans %}
+{% endautoescape %}

weblate/html/mail/new_comment_subject.txt

-{% load i18n %}{% blocktrans %}New comment in {{ subproject }}{% endblocktrans %}
+{% load i18n %}
+{% autoescape off %}
+{% blocktrans %}New comment in {{ subproject }}{% endblocktrans %}
+{% endautoescape %}

weblate/html/mail/new_contributor_subject.txt

-{% load i18n %}{% blocktrans %}New contributor in {{ translation }}{% endblocktrans %}
+{% load i18n %}
+{% autoescape off %}
+{% blocktrans %}New contributor in {{ translation }}{% endblocktrans %}
+{% endautoescape %}

weblate/html/mail/new_language_subject.txt

-{% load i18n %}{% blocktrans %}New language request in {{ translation }}{% endblocktrans %}
+{% load i18n %}
+{% autoescape off %}
+{% blocktrans %}New language request in {{ translation }}{% endblocktrans %}
+{% endautoescape %}

weblate/html/mail/new_string_subject.txt

-{% load i18n %}{% blocktrans %}New string to translate in {{ translation }}{% endblocktrans %}
+{% load i18n %}
+{% autoescape off %}
+{% blocktrans %}New string to translate in {{ translation }}{% endblocktrans %}
+{% endautoescape %}

weblate/html/mail/new_suggestion_subject.txt

-{% load i18n %}{% blocktrans %}New suggestion in {{ translation }}{% endblocktrans %}
+{% load i18n %}
+{% autoescape off %}
+{% blocktrans %}New suggestion in {{ translation }}{% endblocktrans %}
+{% endautoescape %}

weblate/html/mail/new_translation_subject.txt

-{% load i18n %}{% blocktrans %}New translation in {{ translation }}{% endblocktrans %}
+{% load i18n %}
+{% autoescape off %}
+{% blocktrans %}New translation in {{ translation }}{% endblocktrans %}
+{% endautoescape %}

weblate/html/mail/reset_subject.txt

-{% load i18n %}{% load translations %}{% blocktrans %}Password reset on {{ site_title }}{% endblocktrans %}
+{% load i18n %}
+{% load translations %}
+{% autoescape off %}
+{% blocktrans %}Password reset on {{ site_title }}{% endblocktrans %}
+{% endautoescape %}