[BUG] Can't enable kube-explorer ui plugin when creating a cluster

[JacieChao]

Describe the bug
When creating a cluster, can't enable kube-explorer as ui plugin. Only can enable it from the cluster list page.

To reproduce
Steps to reproduce the behavior:

1. Go to the Clusters list page and create a new cluster.
2. Config cluster parameters and enable Explorer as ui plugin in Add-on Options Tab
3. After deploying K3s successfully, the kube-explorer is not enabled as selected.
4. Enable kube-explorer plugin from the Cluster list page is working as expected.

Expected behavior
The kube-explorer plugin can be enabled after deploying the K3s cluster successfully.

Screenshots

Environments (please complete the following information):

• OS: Darwin Bigsur
• AutoK3s Version v0.9.1

Additional context

This bug occurs after adding the support of the Add-ons plugin in Add-on Options Tab.

[JacieChao]

tested by UI version v0.9.2-rc2. close as complete