app: port the action history to GimpConfigWriter, GimpScanner and to GIO

which means the file format has changed, but it will silently ignore
the parse error when encountering the old format.
Bug 733525 - Japanese characters not rendered from imported PDF.

poppler-data is an optional encoding package, necessary to import PDF
with CJK and cyrillic text.
app: typo s/Premission/Permission/