Catch exception in checkTerms if no ID server

This line will throw if it can't get to the ID server, so move it
inside the catch block too.

src/components/views/settings/tabs/user/GeneralUserSettingsTab.js

@@ -160,8 +160,8 @@ export default class GeneralUserSettingsTab extends React.Component {
         // for free. So we might as well use that for our own purposes.
         const idServerUrl = MatrixClientPeg.get().getIdentityServerUrl();
         const authClient = new IdentityAuthClient();
-        const idAccessToken = await authClient.getAccessToken({ check: false });
         try {
+            const idAccessToken = await authClient.getAccessToken({ check: false });
             await startTermsFlow([new Service(
                 SERVICE_TYPES.IS,
                 idServerUrl,