Ensure to publish object changes on the main thread

Signed-off-by: Daniel D’Aquino <daniel@daquino.me>

damus/Features/Settings/Models/UserSettingsStore.swift

@@ -32,7 +32,9 @@ func setting_get_property_value<T>(key: String, scoped_key: String, default_valu
 func setting_set_property_value<T: Equatable>(scoped_key: String, old_value: T, new_value: T) -> T? {
     guard old_value != new_value else { return nil }
     DamusUserDefaults.standard.set(new_value, forKey: scoped_key)
-    UserSettingsStore.shared?.objectWillChange.send()
+    DispatchQueue.main.async {
+        UserSettingsStore.shared?.objectWillChange.send()
+    }
     return new_value
 }