Document Phase 17 (skin_dialog popup shell migration) and enumerate
the 16 remaining dialogs that still bypass render_popup:
sort, compare, overwrite, filter, tree, encoding, connection,
layout, owner, panel_options, pattern, confirm, config,
permission, chattr, progress
Each is ~50-100 LOC of refactor work (replace inline Clear+Block
with render_popup call). Same premium chrome (rounded borders,
MC-matching drop shadow) as Phase 17.
vasilito
2d77249d60