channel_list_button.html

<template id="channel_list_button_template">
    <div @click="buttonClicked">
        <a v-if="$state.ui.app_width > 769">Channel List</a>
        <a v-else><i class="fa fa-list" aria-hidden="true"></i></a>
    </div>
</template>
<script>
kiwi.plugin('channel_list_button', function(kiwi, log) {
    var button = new kiwi.Vue({
        template: '#channel_list_button_template',
        methods: {
            buttonClicked: function buttonClicked() {
                var network = this.$state.getActiveNetwork();
                if (!network.channel_list.length && network.channel_list_state !== 'updating') {
                    network.channel_list_state = 'updating';
                    network.ircClient.raw('LIST');
                }

                network.showServerBuffer('channels');
            }
        },
    });
    button.$mount();
    setTimeout(function t() {
        kiwi.addUi('header_channel', button.$el);
    }, 5000);

});
</script>

No close button showing on mobile device (Samsung S8+)