minor screen reader improvements

ui/src/settings/mail/mailTestModal.js

@@ -195,7 +195,7 @@ function mailTestModal(preselectedCollectionIdOrName = "", template = "") {
                     className: () => `btn expanded ${data.isSending ? "loading" : ""}`,
                     disabled: () => data.isSending || !data.canSubmit,
                 },
-                t.i({ className: "ri-mail-send-line" }),
+                t.i({ className: "ri-mail-send-line", ariaHidden: true }),
                 t.span({ className: "txt" }, "Send"),
             ),
         ),

ui/src/settings/mail/pageMailSettings.js

@@ -370,7 +370,7 @@ export function pageMailSettings(route) {
                                             className: () => `btn expanded outline`,
                                             onclick: () => app.modals.openMailTest(),
                                         },
-                                        t.i({ className: "ri-mail-check-line" }),
+                                        t.i({ className: "ri-mail-check-line", ariaHidden: true }),
                                         t.span({ className: "txt" }, "Send test email"),
                                     );
                                 },