Context switch no longer possible if connection is lost

[Pionerd]

Describe the bug
If the connection to the current kubernetes cluster is no longer working (e.g. because of a shut down VPN), switching contexts (:ctx) is no longer possible and k9s hangs and needs to be restarted.

To Reproduce
Steps to reproduce the behavior:

1. Connect to a private cluster over VPN.
2. Browse a random resource, e.g. :po.
3. Disconnect the VPN connection.
4. Try to switch contexts to another cluster, k9s hangs.

Historical Documents
N/A

Expected behavior
Switching contexts to another cluster should be possible even when the connection to the current cluster is lost.

Screenshots
N/A

Versions (please complete the following information):

• OS: Mac OS 15.5 (24F74)
• K9s: 0.50.9
• K8s: any

Additional context
Possibly related to / similar behavior as #3160