Use Symfony Request for locale module

+++ b/core/modules/locale/locale.pages.incundefined
@@ -65,17 +65,19 @@ function locale_translate_filter_load_strings() {
+      $request = $query->get($key);
+      if (!empty($request)) {

$request isn't the right variable name to use here. Let's use $filterParam instead.

Also, we can use $request->has($key) instead.

+++ b/core/modules/locale/locale.pages.incundefined
@@ -445,10 +447,10 @@ function locale_translate_edit_form_submit($form, &$form_state) {
+  $query = Drupal::request()->query->get('page');

$query isn't the right variable name to use. How about $pageParam.

+++ b/core/modules/locale/locale.pages.incundefined
@@ -445,10 +447,10 @@ function locale_translate_edit_form_submit($form, &$form_state) {
+  if (!empty($query)) {

We can use $request->has('blah');