Add permission to delete comments to managers

Issue #601
Signed-off-by: Michal Čihař <michal@cihar.com>

docs/admin/auth.rst

@@ -167,6 +167,8 @@ Can accept suggestion [Users, Managers]
     Can accept suggestion (might be disabled with :ref:`voting`).
 Can delete suggestion [Users, Managers]
     Can delete suggestion (might be disabled with :ref:`voting`).
+Can delete comment [Managers]
+    Can delete comment.
 Can vote for suggestion [Users, Managers]
     Can vote for suggestion (see :ref:`voting`).
 Can override suggestion state [Managers]

weblate/accounts/models.py

@@ -661,6 +661,7 @@ def create_groups(update):
             Permission.objects.get(codename='accept_suggestion'),
             Permission.objects.get(codename='vote_suggestion'),
             Permission.objects.get(codename='override_suggestion'),
+            Permission.objects.get(codename='delete_comment'),
             Permission.objects.get(codename='delete_suggestion'),
             Permission.objects.get(codename='ignore_check'),
             Permission.objects.get(codename='upload_dictionary'),