[INTERNAL][FIX] Popup - change open flag to fix unit test of value state
message in Combobox

Change-Id: Iac00f3708fe998ad4c306e4cc740e99c1154429b
BCP: 1482001656
CR-Id: 012003146900009082072014
Merge "[INTERNAL][FIX] Popup - change open flag to fix unit test of value state message in Combobox" into rel-1.26