When I use a non-responsive cluster, the IDE is freezing when I close an editor that contains a k8 yaml resource

[adietish]

related to #862

Steps:

1. ASSERT: have a cluster that is non-responsive (ex. local kind cluster, that is shut down)
2. ASSERT: have an editor with a k8 yaml resource opened.
3. EXEC: close the editor

Result:
The IDE is frozen