a translation fix

tower: https://tower.im/projects/d4e0ff64158645f28d99a9ca72d0c27b/todos/8a0994277b874cac9f9b8f5a659058bd/

replace Cancel with Repeal, and did a little modification to
dfiledialog

Change-Id: Ia0c2afab447378daef61fd3d66e810bfa321d190