FIX: 'Popover is null' on keyboard search action (closes #254)

frontend/src/components/GlobalSearch.vue

@@ -26,6 +26,7 @@
     <b-popover custom-class="popover-wide suggestions-popover shadow"
                :show="(search_has_focus) || searching !== 0"
                id="suggestions-popover"
+               ref="suggestionsPopover"
                target="search" placement="bottom">
       <div class="suggestions-wrapper">
         <div v-if="getSearchDiscriminator()" class="text-center suggestion p-3"><i>Globale Suche
@@ -344,6 +345,7 @@ export default {
         if (this.show_search) {
           this.$nextTick(() => {
             this.$refs.search.focus()
+            this.$refs.suggestionsPopover.$emit('open')
           })
         }
       } else {