fix: use different logic for buefy/oruga for product lookup keydown

i could have swore the new logic worked with buefy..but today it didn't

tailbone/templates/products/lookup.mako

@@ -56,7 +56,11 @@
             <b-field grouped>
 
               <b-input v-model="searchTerm" 
-                       ref="searchTermInput" />
+                       ref="searchTermInput"
+                       % if not request.use_oruga:
+                           @keydown.native="searchTermInputKeydown"
+                       % endif
+                       />
 
               <b-button class="control"
                         type="is-primary"
@@ -243,8 +247,10 @@
                 lookupShowDialog: false,
 
                 searchTerm: null,
-                searchTermInputElement: null,
                 searchTermLastUsed: null,
+                % if request.use_oruga:
+                    searchTermInputElement: null,
+                % endif
 
                 searchProductKey: true,
                 searchVendorItemCode: true,
@@ -259,6 +265,8 @@
             }
         },
 
+        % if request.use_oruga:
+
             mounted() {
                 this.searchTermInputElement = this.$refs.searchTermInput.$el.querySelector('input')
                 this.searchTermInputElement.addEventListener('keydown', this.searchTermInputKeydown)
@@ -268,6 +276,8 @@
                 this.searchTermInputElement.removeEventListener('keydown', this.searchTermInputKeydown)
             },
 
+        % endif
+
         methods: {
 
             focus() {