Dconf 0.19.3 Brings Lots of Improvements and Fixes

Dconf 0.19.3 introduces various improvements in the test coverage area, adds a proper DCONF_ERROR error domain, suppress the GLib deprecation warnings during the build process, correctly handles writability changes in GSettings, displays warnings about missing files only once per source, and it will link to -ldl only if it is required. Moreover, Dconf 0.19.3 adds support for ‘file-db’ to profiles, adds support for finding profiles in XDG_DATA_DIRS when they are not available in /etc, adds a section separator to the App Menu for flexibility, and adds the ‘dconf compile’ command for easily building dconf databases from keyfiles in random locations.