Added change password permission

Replaces SHOW_PROFILE_EDIT_PASSWORD option
Can be set on per user or per group basis

accounts/migrations/0004_apply_change_password.py

@@ -0,0 +1,25 @@
+from django.db import migrations
+
+
+def apply_change_password(apps, schema_editor):
+    from django.conf import settings
+    from django.contrib.auth.models import User, Permission
+
+    if hasattr(settings, 'SHOW_PROFILE_EDIT_PASSWORD'):
+        if settings.SHOW_PROFILE_EDIT_PASSWORD:
+            permission = Permission.objects.get(codename='change_password')
+            users = User.objects.all()
+            user: User
+            for user in users:
+                user.user_permissions.add(permission)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('accounts', '0003_permissionset'),
+    ]
+
+    operations = [
+        migrations.RunPython(apply_change_password),
+    ]