[CircleGraph] Fix change of `viewer` mode deselcts all nodes in `selector` mode

### What?

Any change of mode in `viewer` deselects all previously selected nodes in `selector` mode.
### Why?

See original discussion in https://github.com/Samsung/ONE-vscode/pull/1543#issuecomment-1545415786 and https://github.com/Samsung/ONE-vscode/pull/1543#issuecomment-1552804838.

draft: https://github.com/Samsung/ONE-vscode/pull/1543