Version 7.3.0

Changes from upstream Tab Session Manager (v7.2.0 - v7.3.0):

• Fix: Tag removal can now be undone/redone correctly (upstream #1535)
• New: "Minimum number of tabs" option for auto-save on window close — windows with fewer tabs than the threshold won't be saved automatically (upstream #1584)
• Updated build tooling (Node.js/npm) for Mozilla add-on compliance

Internal:
- Added Prettier code formatter for consistent code style
- Aligned version numbering with upstream (7.3.0)

7.1.1.8:

Tab Groups Support - Saves and restores tab groups (no additional extension required)

7.1.1.7:

Backup setup modal with improved UX
Scheduled backup option (daily at 3 a.m. + after 3 manual saves)

7.1.1.6:

Thumbnails embedded in exports - Preserved during import/export
Grid drag-and-drop and toolbar fixes
Donation UI removed
Improved install flow

-added drag & drop between two windows