Add .assignee to gr-change-list-styles
Add .assignee to gr-change-list-styles

Change-Id: Id874df2d06a8264b770e3e364634bd28ec821467
(cherry picked from commit 22daf54423bb2441b571a50196c16d6389dc8c75)

GerritCodeReview/gerrit,gerrit-review/gerrit,WANdisco/gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,gerrit-review/gerrit,GerritCodeReview/gerrit,GerritCodeReview/gerrit,gerrit-review/gerrit,qtproject/qtqa-gerrit,qtproject/qtqa-gerrit,gerrit-review/gerrit,gerrit-review/gerrit,GerritCodeReview/gerrit,qtproject/qtqa-gerrit,WANdisco/gerrit,qtproject/qtqa-gerrit,WANdisco/gerrit,qtproject/qtqa-gerrit,GerritCodeReview/gerrit,gerrit-review/gerrit,GerritCodeReview/gerrit,qtproject/qtqa-gerrit,gerrit-review/gerrit,WANdisco/gerrit,qtproject/qtqa-gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,WANdisco/gerrit