Adds back the preview mode shortcut now with a modifier key to be `⌥ +
P` on mac or `Alt + P` on windows
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## Summary by CodeRabbit
- **New Features**
- Enhanced the Preview Mode with additional hotkeys (`alt + p`) for
toggling, improving user experience in navigating the editor.
- Improved tooltip messages for better clarity on shortcuts available to
the user.
- **Tests**
- Updated regression tests to cover new Preview Mode functionality and
ensure its reliability.
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