Fixes

• kubectl delete does not properly handle some kube-proxy errors #8005
• Kubernetes Context widget, when changing contexts, does not always update widget text as expected (the context change is successful, this is a cosmetic bug) #7997

Warning about the signed macOS builds: these will be quite laggy, though still usable. See the discussion here. Hopefully the underlying Electron/nodejs bugs will be fixed soon, so we can mainstream the signed builds.