LXL-4457: Keep sort options when doing new searches (#1086)

* Use _sort value from route as preferred sort

* Check if sort from query param is available for active search type

* Use includes instead of strict equality check to allow localized _sortKeyByLang

vue-client/src/components/search/search-form.vue

@@ -234,6 +234,14 @@ export default {
       return { '@type': type };
     },
     prefSort() {
+      if (
+        this.$route.query?._sort
+        && this.settings.sortOptions[this.activeSearchType]
+          ?.find((sortOption) => this.$route.query._sort.includes(sortOption.query))
+          // use includes instead of strict equality check to allow localized _sortKeyByLang (e.g. _sortKeyByLang.sv)
+      ) {
+        return { _sort: this.$route.query._sort };
+      }
       if (this.user && this.user.settings.sort) {
         const availableSorts = this.settings.sortOptions[this.user.settings.searchType];