Allow first tag to be selected on enter key

Also allow the Label to be modified; code style too
Signed-off-by: Micheal Mand <micheal@kmdwebdesigns.com>

Modules/Tag/Assets/js/components/TagInput.vue

 <template>
-    <el-form-item label="Tags">
-        <el-select v-model="tags" multiple filterable allow-create remote @change="triggerEvent">
+    <el-form-item :label="label">
+        <el-select v-model="tags" multiple filterable allow-create remote default-first-option @change="triggerEvent">
             <el-option v-for="tag in availableTags"
-                       :key="tag.slug"
-                       :label="tag.slug"
-                       :value="tag.name">
-            </el-option>
+                :key="tag.slug"
+                :label="tag.slug"
+                :value="tag.name"
+            ></el-option>
         </el-select>
     </el-form-item>
 </template>
 
 <script>
-    import axios from 'axios'
+    import axios from 'axios';
 
     export default {
         props: {
-            namespace: {String},
-            currentTags: {default : null},
+            namespace: { type: String },
+            label: { type: String, default: 'Tags' },
+            currentTags: { default: null },
         },
         data() {
             return {
                 tags: {},
                 availableTags: {},
-            }
+            };
         },
         methods: {
             triggerEvent() {
                 this.$emit('input', this.tags);
-            }
+            },
         },
         watch: {
             currentTags: function () {
                 if (this.currentTags !== null) {
                     this.tags = this.currentTags;
                 }
-            }
+            },
         },
         mounted() {
-            axios.get(route('api.tag.tag.by-namespace', {namespace: this.namespace}))
+            axios.get(route('api.tag.tag.by-namespace', { namespace: this.namespace }))
                 .then(response => {
                     this.availableTags = response.data;
                 });
-        }
-    }
+        },
+    };
 </script>