Pass query string when navigating legacy pages

CHANGELOG.rst

@@ -33,6 +33,7 @@ Fixed
 * The `Stop Impersonation` button is not shown due to an oversee when changing the type of the whoAmI query to an object of UserType
 * Offline fallback page for legacy pages was misleading sometimes.
 * Route changes in the Legacy-Component iframe didn't trigger a scroll to the top
+* Query strings did not get passed when navigating legacy pages inside of the SPA.
 
 `3.0b3`_ - 2023-03-19
 ---------------------

aleksis/core/frontend/components/LegacyBaseTemplate.vue

@@ -59,13 +59,14 @@ export default {
       const location = this.$refs.contentIFrame.contentWindow.location;
       const url = new URL(location);
       const path = url.pathname.replace(/^\/django/, "");
+      const pathWithQueryString = path + encodeURI(url.search);
       const routePath =
         path.charAt(path.length - 1) === "/" &&
         this.$route.path.charAt(path.length - 1) !== "/"
           ? this.$route.path + "/"
           : this.$route.path;
       if (path !== routePath) {
-        this.$router.push(path);
+        this.$router.push(pathWithQueryString);
       }
 
       // Show loader if iframe starts to change its content, even if the $route stays the same