zulip/static/templates/message_controls.hbs

<div class="message_controls{{#status_message}} sender-status-controls{{/status_message}} no-select">
    {{#if msg/sent_by_me}}
    <div class="edit_content"></div>
    {{/if}}

    {{#unless msg/sent_by_me}}
    <div class="reaction_button">
        <i class="fa fa-smile-o" aria-label="{{#tr this}}Add emoji reaction{{/tr}} (:)" role="button" aria-haspopup="true" tabindex="0"></i>
    </div>
    {{/unless}}

    {{#unless msg/locally_echoed}}
    <div class="info actions_hover">
        <i class="fa fa-chevron-down" title="{{#tr this}}Message actions{{/tr}} (i)" title="{{#tr this}}Message actions{{/tr}}" role="button" aria-haspopup="true" tabindex="0" aria-label="{{#tr this}}Message actions{{/tr}}"></i>
    </div>
    {{/unless}}

    <div class="message_failed {{#unless msg.failed_request}}notvisible{{/unless}}">
        <i class="fa fa-refresh refresh-failed-message" data-toggle="tooltip" title="{{t 'Retry' }}" aria-label="{{t 'Retry' }}" role="button" tabindex="0"></i>
        <i class="fa fa-times-circle remove-failed-message" aria-hidden="true" data-toggle="tooltip" title="{{t 'Cancel' }}"></i>
    </div>

    {{#unless msg/locally_echoed}}
    <div class="star fa {{#if msg/starred}}fa-star{{else}}fa-star-o{{/if}} {{#if msg/starred}}{{else}}empty-star{{/if}}" title="{{#tr this.msg}}__starred_status__ this message{{/tr}} (*)">
    </div>
    {{/unless}}

</div>