Overview of Changes from GTK+ 2.24.16 to 2.24.17
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* Bug fixes:
 GtkFileChooserButton fixes:
  - Don't emit file-set signal when the change is not the result
    of a user action
  - Don't ever use gtk_file_chooser_get_files
  - Ensure internal consistency when clearing a model
 690247 multiple context in a immodule can't be selected
 692955 GtkIconCache fails to load non-builtin icons
 694742 Fix possible memory leak when GlobalAlloc() fails