Fix focus for <b-select> shim component

tailbone/templates/themes/butterball/buefy-components.mako

@@ -507,6 +507,7 @@
 <%def name="make_b_select_component()">
   <script type="text/x-template" id="b-select-template">
     <o-select :name="name"
+              ref="select"
               v-model="orugaValue"
               @update:model-value="orugaValueUpdated"
               :expanded="expanded"
@@ -545,6 +546,9 @@
             },
         },
         methods: {
+            focus() {
+                this.$refs.select.focus()
+            },
             orugaValueUpdated(value) {
                 this.$emit('update:modelValue', value)
                 this.$emit('input', value)