<div v-show="prob.uid==userid && !preview" class="button-group">
<button @click="$emit('edit-problem')">Edit</button>
<button @click="$emit('delete-problem')">Delete</button>
<div v-show="prob.uid==userid && !preview" class="button-group">
<button @click="$emit('edit-problem')">Edit</button>
<button @click="$emit('delete-problem')">Delete</button>