Properly sync US and GB translation files (#6635)

add en-US changes to SaaS, previously merged into main. So this is
effectively a main -> SaaS PR also. It seems to be all additive.

Also take the 230 ish missing translations from en-GB over to en-US
using a script, and also make and english spellings American when adding
them to the en-US file, and fix any existing American spellings in the
en-GB file.

frontend/editor/src/proprietary/services/policyApi.ts

@@ -30,7 +30,9 @@ export async function savePolicy(
 
 /** List all stored policies. */
 export async function listPolicies(): Promise<BackendPolicy[]> {
-  const res = await apiClient.get<BackendPolicy[]>("/api/v1/policies");
+  const res = await apiClient.get<BackendPolicy[]>("/api/v1/policies", {
+    suppressErrorToast: true,
+  });
   return res.data;
 }