update to 1.8.7
    
    - Use the “notify::text” signal instead of “activate” on GtkEntry widget.
      This is to make changes in the text entry widgets in the setup tool apply
      immediately.
    - Move the “Restore all defaults” button into the GtkButtonBox at the bottom
    - Update Unihan_Variants.txt from “2013-02-25 Unicode 6.3.0” to “2014-05-09 Unicode 7.0.0”