[geary] (10 commits) ...Merge branch 'mjog/data-location-migration' into 'mainline'

[Michael Gratton <mjog src gnome org>]

Summary of changes:

  d7e05ab... client: Move Migrate namespace to be under Util (*)
  e806137... Application.Controller: Clean up config/data vars in ctor (*)
  6934841... Application.Controller: Clean up invoking XDG config migrat (*)
  468ea6d... Application.Client: Rename app user dirs to home dirs (*)
  9658e9e... Geary.Controller: Migrate release config if needed (*)
  8998341... org.gnome.Geary.yaml: Enable copying release config for nig (*)
  0721560... Application.Client: Support determining if running under fl (*)
  99fc14a... Application.Client: Introduce and use consts for build prof (*)
  368a0ce... Application.Client: Ensure non-release builds don't clobber (*)
  3aa9eb7... Merge branch 'mjog/data-location-migration' into 'mainline'

(*) This commit already existed in another branch; no separate mail sent