Update urlParams on Jira issues list page

When already set to the default values, we don't need to
include params like page, sort, state in urlParams.

This prevents the URL to flash and update on load from
/-/integrations/jira/issues to
/-/integrations/jira/issues?page=1&sort=created_desc&state=opened

Changelog: changed
EE: true

ee/app/assets/javascripts/integrations/jira/issues_list/components/jira_issues_list_root.vue

@@ -74,10 +74,10 @@ export default {
     urlParams() {
       return {
         'labels[]': this.filterParams.labels,
-        page: this.currentPage,
         search: this.filterParams.search,
-        sort: this.sortedBy,
-        state: this.currentState,
+        ...(this.currentPage === 1 ? {} : { page: this.currentPage }),
+        ...(this.sortedBy === this.initialSortBy ? {} : { sort: this.sortedBy }),
+        ...(this.currentState === this.initialState ? {} : { state: this.currentState }),
       };
     },
   },

ee/spec/frontend/integrations/jira/issues_list/components/__snapshots__/jira_issues_list_root_spec.js.snap

@@ -152,10 +152,7 @@ Object {
   "totalItems": 3,
   "urlParams": Object {
     "labels[]": undefined,
-    "page": 1,
     "search": undefined,
-    "sort": "created_desc",
-    "state": "opened",
   },
   "useKeysetPagination": false,
 }