The HDR / Panorama / HDR Panorama dialogs now open with the options of the
last merge of that kind instead of the defaults, and those options are kept
in the library's prefs.json (Session::last_merge) so they survive a restart.
"With Last Settings" and HDR for Each Bracket Set read the same store.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>