Add key=>value support to array_pluck
Call array_pluck in lists method instead of using its own implementation
backport title function.
Merge pull request #2295 from JosephSilber/feature/array_pluck-key-value

Add key => value support to array_pluck, and use that in Collection::lists()
fix conflicts.
dont use namespace when calculating view path.
Merge branch '4.0'