bugs for credentials list page of devops project

Created by: junotx

Describe the bug

1. The list still shows all credentials when searching by name kubeconfig
2. Outliers are displayed in the search box when clicking refresh button
3. There is a problem with the paging function

Versions used(KubeSphere/Kubernetes) KubeSphere(2020-07-24)

Environment allinone

/kind bug