Log Message:
Update gtk2 to 2.24.31

Overview of Changes from GTK+ 2.24.30 to 2.24.31
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* File chooser:
 - backport many file chooser entry fixes and cleanups
 - don't crash if invisible files are deleted

* Bug fixes:
 555087 Shouldn't the return type of gtk_entry_completion_get_model be Gtk...
 586367 In local_only mode, file chooser should return native paths for fi...
 635287 Specify packages when generating GIR
 640698 Incompatibility in 'matched-selected' signal invocation
 648419 crash in remove_capslock_feedback at gtkentry.c line 10127
 672271 File chooser seems over-enthusiastic about using subdirectories
 679333 unable to filter folders in folder select mode
 687196 filesystemmodel: invalidate nodes on file remove
 703220 (CVE-2013-7447) Memory allocation integer overflow in gdk_cairo_se...
 720330 Gtk-CRITICAL **: gtk_entry_completion_set_model: assertion 'GTK_IS...
 729927 impossible to create a directory if the contents of the current on...
 737777 Applications crash randomly while printing with a password-secured...
 752707 Location bar navigation to parent directories
 756450 GTK file chooser completion dropdown sets cursor in wrong position
 765120 Configure notify does not always reflect window size enforced by (...
 765193 Add introspection support for Visual Studio builds
 768163 improved fullscreen behaviour
 764996 GDK: Incorrect window size when creating window with position spec...
 769126 Can't type astral plane characters into a GtkEntry using the Windo...