Show update UI on backup version mismatch

ts/types/InstallScreen.ts

@@ -17,6 +17,11 @@ export enum InstallScreenBackupStep {
   Process = 'Process',
 }
 
+export enum InstallScreenBackupError {
+  Unknown = 'Unknown',
+  UnsupportedVersion = 'UnsupportedVersion',
+}
+
 export enum InstallScreenError {
   TooManyDevices = 'TooManyDevices',
   TooOld = 'TooOld',