NocoBase v1.7.0-beta.20: Allow restore main app from sub app backup

🚀 Improvements

• [Backup manager] allow restore main app from sub app backup by @gchust

🐛 Bug Fixes

• [client] Fix error thrown in create / update node of workflow (#6696) by @mytharcher

• [Workflow: Manual node] Fix ACL error in tasks center (#6693) by @mytharcher

• [Workflow: Approval] Fix ACL error in tasks center by @mytharcher