fix: admin UI improvements

client/components/admin/admin-groups.vue

@@ -8,7 +8,7 @@
             .headline.blue--text.text--darken-2.animated.fadeInLeft Groups
             .subtitle-1.grey--text.animated.fadeInLeft.wait-p4s Manage groups and their permissions
           v-spacer
-          v-btn.animated.fadeInDown.wait-p2s.mr-3(color='grey', outlined, @click='refresh', large)
+          v-btn.animated.fadeInDown.wait-p2s.mr-3(color='grey', outlined, @click='refresh', icon)
             v-icon mdi-refresh
           v-dialog(v-model='newGroupDialog', max-width='500')
             template(v-slot:activator='{ on }')