It's not possible to edit selected VM displayed through Resource Pool's textual summary page, nothing in the UI, no error.
Steps:
- Go to Compute > Infra > Resource Pools
- Click on some Resource Pool to display its summary
- In Relationships, click on Direct VMs or All VMs
- Select some VM and Configuration > Edit Selected item
=> nothing happens in the UI, no error:

However, editing the same VM is possible when accesing the VM through Compute > Infra > VMs, or from textual summary of the VM:
