Update backup creation paths for SSSS

This updates the various backup creation entry points to ensure they support
creating with secret storage if the feature flag is enabled.

src/components/views/dialogs/LogoutDialog.js

@@ -102,6 +102,7 @@ export default class LogoutDialog extends React.Component {
         } else {
             Modal.createTrackedDialogAsync("Key Backup", "Key Backup",
                 import("../../../async-components/views/dialogs/keybackup/CreateKeyBackupDialog"),
+                null, null, /* priority = */ false, /* static = */ true,
             );
         }
 

src/components/views/dialogs/keybackup/RestoreKeyBackupDialog.js

@@ -76,7 +76,7 @@ export default class RestoreKeyBackupDialog extends React.PureComponent {
                 onFinished: () => {
                     this._loadBackupStatus();
                 },
-            },
+            }, null, /* priority = */ false, /* static = */ true,
         );
     }