If you launch Emacs by giving it a file to open, the auto-loading of the
default desktop would remove that file, as it is not likely to be part
of the default desktop.
Instead desktop management is now disabled until you specifically load a
desktop with `desktop+-load-or-create` (bound to `C-z C-z C-s`).
Most visual/theme related frame parameters I prefer coming from the
active config, rather than being restored to what they were when the
desktop/session file was saved.