Refresh TreeView to render modifications.

## Describe the bug

Refresh TreeView to render modifications. After any modification, a popup appears.

## To Reproduce

- Namespaces - change the `Name`

## Expected behavior

After modification, the node Name should reflect the new value

![Untitled](https://user-images.githubusercontent.com/11937915/121492619-4eac5300-c9d7-11eb-8408-d1633e30505c.png)