Add import list to Data.List

See https://downloads.haskell.org/ghc/8.10.3/docs/html/users_guide/using-warnings.html?highlight=wcompat#ghc-flag--Wcompat-unqualified-imports

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And also fix Safe annotation

mentioned in commit phadej/ghc@0dde4153

mentioned in merge request ghc/ghc!4860 (closed)

mentioned in commit phadej/ghc@24cce49e

mentioned in commit phadej/ghc@3c513be0

mentioned in commit phadej/ghc@6bb118cf

mentioned in commit ghc/ghc@618373f2

mentioned in commit ghc/ghc@6fc92084

ping @bgamari

approved this merge request

merged

mentioned in issue ghc/ghc#20025 (closed)