Use latest backup status directly rather than via state

This uses the latest backup status we just retrieved by returning from the
lookup path (instead of using it indirectly via state). This is important
because state updates are batched, so we can't rely on the value to be updated
immediately like we were.

Fixes https://github.com/vector-im/riot-web/issues/12562

src/async-components/views/dialogs/secretstorage/CreateSecretStorageDialog.js

@@ -117,6 +117,11 @@ export default class CreateSecretStorageDialog extends React.PureComponent {
             backupInfo,
             backupSigStatus,
         });
+
+        return {
+            backupInfo,
+            backupSigStatus,
+        };
     }
 
     async _queryKeyUploadAuth() {
@@ -269,13 +274,13 @@ export default class CreateSecretStorageDialog extends React.PureComponent {
         const RestoreKeyBackupDialog = sdk.getComponent('dialogs.keybackup.RestoreKeyBackupDialog');
         const { finished } = Modal.createTrackedDialog(
             'Restore Backup', '', RestoreKeyBackupDialog, {showSummary: false}, null,
-            /* priority = */ false, /* static = */ true,
+            /* priority = */ false, /* static = */ false,
         );
 
         await finished;
-        await this._fetchBackupInfo();
+        const { backupSigStatus } = await this._fetchBackupInfo();
         if (
-            this.state.backupSigStatus.usable &&
+            backupSigStatus.usable &&
             this.state.canUploadKeysWithPasswordOnly &&
             this.state.accountPassword
         ) {