LIB/GTK: use System.FilePath instead of System.FilePath.Posix

src/GUI/Gtk/Gui.hs

@@ -69,7 +69,7 @@ import System.Environment
   (
     getArgs
   )
-import System.FilePath.Posix
+import System.FilePath
   (
     isAbsolute
   )

src/IO/File.hs

@@ -22,7 +22,7 @@ import System.Directory
   , removeDirectory
   , removeFile
   )
-import System.FilePath.Posix
+import System.FilePath
   (
     isAbsolute
   )