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Glade 3.8.1
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       - Correctly detect the required devhelp version (Javier Jardón)
       - Sort objects in output by property reference, ensures a
         GtkTreeModelFilter gets serialized after its 'child-model' (fixes bug 657164)
       - Fixed crashers when performing "Remove Parent" (bug 657338)
       - Ensure 'use-action-appearance' is serialized
         before 'related-action' (bug 658497)
       - Properly escape special characters while serializing
         property values (bug 654609 - Fabien Parent)
       - Fix GladeProject to notify "row-has-child-toggled", (fixes bug 651673).