feat: query string dynamic app config (#3391)

* feat: query string dynamic app config

* fix: bug fix and couple of very small improvements

extensions/default/src/ViewerLayout/index.tsx

@@ -46,13 +46,27 @@ function ViewerLayout({
   const onClickReturnButton = () => {
     const { pathname } = location;
     const dataSourceIdx = pathname.indexOf('/', 1);
-    const search =
-      dataSourceIdx === -1
-        ? undefined
-        : `datasources=${pathname.substring(dataSourceIdx + 1)}`;
+    // const search =
+    //   dataSourceIdx === -1
+    //     ? undefined
+    //     : `datasources=${pathname.substring(dataSourceIdx + 1)}`;
+
+    // Todo: Handle parameters in a better way.
+    const query = new URLSearchParams(window.location.search);
+    const configUrl = query.get('configUrl');
+
+    const searchQuery = new URLSearchParams();
+    if (dataSourceIdx !== -1) {
+      searchQuery.append('datasources', pathname.substring(dataSourceIdx + 1));
+    }
+
+    if (configUrl) {
+      searchQuery.append('configUrl', configUrl);
+    }
+
     navigate({
       pathname: '/',
-      search,
+      search: decodeURIComponent(searchQuery.toString()),
     });
   };