fix(notifications): a notice's button is said when shown, like its text

An action label was translated when the notice was raised, so after a language switch a live
toast or center row read in one language with its button in the other. The access-requests nudge
no longer re-issues on a switch for it. New tests: the button and a server refusal follow a
switch.

frontend/src/modules/files/UploadDialog.tsx

@@ -107,7 +107,7 @@ export default function UploadDialog({
         level: "success",
         message: msg(uploadedKey(job.status)),
         action: {
-          label: t("downloads.dialog.view"),
+          label: msg("downloads.dialog.view"),
           onClick: () => openUploaded(job),
         },
       });