zulip/static/templates/stream_settings_checkbox.hbs

{{!-- If setting is disabled on realm level, then render setting as control-label-disabled and do not set setting value. Setting status should not change on any click handler, as it is disabled at realm level. --}}
<div id="sub_{{setting_name}}_setting"
  class="sub_setting_checkbox
  {{#if disabled_realm_setting}}control-label-disabled{{else}}
  {{#if notification_setting}}sub_notification_setting {{#if is_muted}}muted-sub{{/if}}{{/if}}{{/if}}">
    <input id="{{setting_name}}_{{stream_id}}" name="{{setting_name}}"
      class="sub_setting_control" type="checkbox" tabindex="-1"
      {{#if is_checked}}checked{{/if}}{{#if is_disabled}}disabled="disabled"{{/if}} />
    <label class="subscription-control-label">{{label}}</label>

    {{!-- Tooltips for settings --}}
    {{#if (eq setting_name "is_muted")}}
    <p class="mute-note {{#unless is_muted}}hide-mute-note{{/unless}}">
        {{t "Muted streams don't show up in \"All messages\" or generate notifications unless you are mentioned." }}
    </p>
    {{/if}}
    {{#if (eq setting_name "push_notifications")}}
    <i class="fa fa-question-circle settings-info-icon {{#unless disabled_realm_setting}}hide{{/unless}}"
      data-toggle="tooltip"
      title="{{t 'Mobile push notifications are not configured on this server.' }}">
    </i>
    {{/if}}
</div>