Project view search bar shows assets from asset store even when asset store hits is disabled in preferences.

Steps to reproduce
1) Create new project
2) Edit > Preferences > Uncheck "Show asset store search hits"
3) In Project view search bar, search for any asset and switch to "Asset store" in search dropdown

Actual result: Project view shows assets from asset store
Expected result: Project view should not show assets from asset store when disabled in preferences

Environment: Occurs on Windows(7,10) and Mac(10.12,10.13)

Reproducible on: 2018.2.0a7, 2018.1.0b13, 2018.1.0b1, 2017.3.0f3, 2017.2.0f3, 2017.1.0f1, 5.5.6f1