Changes in dconf 0.11.7
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 - engine: don't leak the lock table if a system database changes while
   a program is running

 - dbus-1: call g_slist_remove_link instead of g_slist_remove

 - editor: set 'wrap' property on default value label

 - dconf update:

   - code cleanup, better error handling
   - read keyfiles in a defined order (later files take precedence)
   - don't issue warnings if a key is defined in multiple files