iprutils: Change concurrent maintenance GUI to 3 ways toggle
iprutils: Change concurrent maintenance GUI to 3 ways toggle

This patch changes concurrent maintenance GUI to 3 ways toggler, also change
"platform location" as parameter for identify-slot/add-slot/remove-slot
commands.

Signed-off-by : Wen Xiong <wenxiong@linux.vent.ibm.com>

leitao/iprutils