v-toolbar disabled when screen too small

[jimhome1608]

Hi Open this http://gpstracker.jimclark.net.au on a desktop and click the top left menu icon to hide and show the v-navigation-drawers but if you resize to smaller screen (or open on a mobile) and do same the v-toolbar goes into a disable state!!

template>

Multilink search apps refresh more_vert Support {{ item.icon }} {{ item.title }} Sales {{ item.icon }} {{ item.title }}

<script> export default { name: 'HelloWorld', data () { return { drawer: true, support: true, salesdrawer: true, items: [ { title: 'XML Jobs', icon: 'dashboard' }, { title: 'Find User', icon: 'account_box' }, { title: 'OFI Activity', icon: 'gavel' } ], msg: 'Welcome to Your Vue.js App' } } } </script>