ANG-8071:  Add grey arrow to deactivated state for Contextual Popup Button

Fixing http://jira2.lgsvl.com/browse/ANG-8071

There is a BeeHive fix for this but it is risky to merge the refactored contextual popup into 2.3.0 branch. https://github.com/enyojs/moonstone/pull/1213
So, apply the same asset but implementing based on 2.3.0 branch status.

DCO-1.1-Signed-Off-By: Kunmyon Choi kunmyon.choi@lge.com