Log Message:
Changes 2.8.10:

Core:
- Set manifest as Windows 8 compatible

GUI:
- Indicate if a file was exported in the Quit dialog
- Add shortcuts and hint labels to the close and quit dialogs
  that make closing and quitting easier and more consistent
- Rename the File->Export menu labels to match Save/Save as
- Fix keyboard shortcuts on OSX Mavericks
- Don't open lots of progress popups when opening many files
- Correctly restore the hidden state of docks in single window mode

Libgimp:
- Fix exporting an image consisting of a single layer group
- Don't attempt to pick transparent colors

Plug-ins:
- Fix crash in LCMS plugin if RGB profile was missing

General:
- Fix compile on NetBSD (missing -lexecinfo)
- Bug fixes
- Translation updates