Overview of Changes from GTK+ 2.24.12 to 2.24.13
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* Implement a gtk-primary-button-warps-slider setting
  that lets us adjust scale and scrollbar behaviour
  according to platform.

* Bug fixes:
 661973 Try harder to discriminate Shift-F10 and F10
 675365 Always check if the global context id changed
 674108 Hard crash due to wrong NSAutoreleasePool stacking

* Translation updates:
 Polish