When opening the cache explorer, import GTK only after forking, so that
When opening the cache explorer, import GTK only after forking, so that

ATK doesn't crash when accessibility is being used (reported by Guillaume
Millet).

git-svn-id: eb86470c0dbc9d881c76e652f76111a30a15f3d1@1139 9f8c893c-44ee-0310-b757-c8ca8341c71e

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