resolve background color using system trait collection

[vovasty]

We should resolve color using node's trait collection, but Texture changes it from many places, so node may receive the wrong one.
This is a quick fix. We should revise trait collection propagation mechanism.

[nguyenhuy]

Looks good to me. For more context, we didn't resolve the background color from the node's trait collection before #1762 so this diff can be considered as a partial revert of #1762.

We still don't know why the trait collection never arrives at a valid value. We'll follow up to root cause it.

[nguyenhuy]

CI is broken for some reasons. In previous runs, everything passed excepts Danger. Gonna land this diff now and figure out the CI issues later.