bug after Commit 85827b5

[hugo345816]

Commit 85827b5 add KUBE_PS1_HIDE_IF_NOCONTEXT option. But it introduced a bug.

I want to display only the namespace， so I set KUBE_PS1_CONTEXT_ENABLE=false. Now show nothing. It correct befor Commit 85827b5.

I guess it may be caused by the following statement：

[[ "${KUBE_PS1_CONTEXT}" == "N/A" ]] && [[ ${KUBE_PS1_HIDE_IF_NOCONTEXT} == false ]] && return

[jonmosco]

I am not able to reproduce this behavior. When disabling the context with KUBE_PS1_CONTEXT_ENABLE=false the prompt displays only the namespace as expected.