Remove articles if error

src/components/DictionaryView.vue

@@ -132,6 +132,7 @@ function navigate_to_search(self, query) {
     }
   })
   .catch(function(error){
+    self.articles = null
     if (error.response && error.response.status == 400) {
       self.error = "Søkeuttrykket inneholder feil"
     } else if (error.response) {