Revert "Merge branch 'ver.FlatUIKit'"

This reverts commit 44dbc3466a94040ff7781b9e25ac8aed633157a3, reversing
changes made to 450f8eb7f8ef0656f4ee62ee398200c90d077b96.
Revert "Revert "Merge branch 'ver.FlatUIKit'""

This reverts commit dd204243b0ec749f1a4315916607f33a81c8ca52.
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