Fix watched video cell leading icon color  (#1483)
Fix watched video cell leading icon color  (#1483)

* don't change watched video cell leading icon color
edx/edx-app-ios,edx/edx-app-ios,edx/edx-app-ios,edx/edx-app-ios,edx/edx-app-ios,edx/edx-app-ios,edx/edx-app-ios