Priority Marker Icons

Version 1.6.0

- Added per-dungeon import and export with recognizable dungeon codes.
- Added clickable “Share Marks” links for sharing dungeon configurations through in-game chat.
- Added import confirmation before shared marks replace the current dungeon configuration.
- Added NPC search and visibility filters.
- Added filtering by assigned marker.
- Added multi-selection and bulk marker assignment.
- Added per-dungeon reset controls.
- Added live summaries showing enabled, visible, and selected NPC counts.
- Added marker usage totals and duplicate-marker notices.
- Improved validation for imported dungeon strings.
- Fixed Share Marks messages so they can be sent normally through WoW chat.
- Shared configurations replace only the selected dungeon and do not affect other dungeon settings.