BattleMaps

Pin profiles
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- Existing global pin settings are retained after migration.
- "Use one pin profile for all battlegrounds" preserves the former behaviour.
- Disable it to edit the selected battleground's own four-value pin profile.
- Pin changes save immediately; the map-layout Save button is not required.
- "Apply Current to All" copies the selected map profile to every map.
- In shared mode, the same button becomes "Copy Shared to All" and updates the
  stored per-map profiles without changing the active shared mode.
- Switching between shared and per-map modes preserves previously edited
  per-map profiles.

Battleground notifications
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- BattleMaps manages Blizzard's RaidWarningFrame, used by many battleground
  announcements.
- Controls include scale, text-area width, left/centre/right alignment,
  independent positioning, and Battlefield Map anchoring.
- "Move Notifications" reveals the draggable anchor.
- "Preview" sends a native warning-frame test message.
- /bmapnotify opens the options window and toggles the notification mover.
- The optional compatibility bridge keeps /mrw as an alias.