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="{{prefix}}{{setting_name}}{{suffix}}" class="sub_setting_checkbox {{#unless realm_setting_disabled}}{{#if notification_setting}}sub_notification_setting {{#if is_muted}}muted-sub{{/if}}{{/if}}{{else}}control-label-disabled{{/unless}}">
    <input id="{{setting_name}}_{{stream_id}}" name="{{setting_name}}" class="sub_setting_control" type="checkbox" tabindex="-1" {{#if (and (not realm_setting_disabled) is_checked)}}checked{{/if}}{{#if (or (and is_muted notification_setting) realm_setting_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 realm_setting_disabled}}hide{{/unless}}" data-toggle="tooltip" title="{{t 'Mobile push notifications are not configured on this server.' }}"></i>
    {{/if}}
</div>