left-sidebar: Show starred message counts by default.

It is changed just to make this feature more discoverable.

Fixes: #18305.

zerver/migrations/0323_show_starred_message_counts.py

@@ -0,0 +1,32 @@
+# Generated by Django 3.1.8 on 2021-05-01 12:34
+
+from django.db import migrations, models
+from django.db.backends.postgresql.schema import DatabaseSchemaEditor
+from django.db.migrations.state import StateApps
+
+
+# Set starred_message_count for already existing users to True.
+def set_starred_message_count_to_true(apps: StateApps, schema_editor: DatabaseSchemaEditor) -> None:
+    UserProfile = apps.get_model("zerver", "UserProfile")
+    UserProfile.objects.filter(starred_message_counts=False).update(starred_message_counts=True)
+
+
+class Migration(migrations.Migration):
+    atomic = False
+
+    dependencies = [
+        ("zerver", "0322_realm_create_audit_log_backfill"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="userprofile",
+            name="starred_message_counts",
+            field=models.BooleanField(default=True),
+        ),
+        migrations.RunPython(
+            set_starred_message_count_to_true,
+            reverse_code=migrations.RunPython.noop,
+            elidable=True,
+        ),
+    ]

zerver/models.py

@@ -1284,7 +1284,7 @@ class UserProfile(AbstractBaseUser, PermissionsMixin):
     high_contrast_mode: bool = models.BooleanField(default=False)
     translate_emoticons: bool = models.BooleanField(default=False)
     twenty_four_hour_time: bool = models.BooleanField(default=False)
-    starred_message_counts: bool = models.BooleanField(default=False)
+    starred_message_counts: bool = models.BooleanField(default=True)
     COLOR_SCHEME_AUTOMATIC = 1
     COLOR_SCHEME_NIGHT = 2
     COLOR_SCHEME_LIGHT = 3