Added Show in Dock Toggle and System Tray Feature

[tanuj-22]

Resolves #62

• Added Show in Dock Toggle in settings
• There's a limitation in macOS with Electron, so I fixed this by adding the system tray in the menubar so that menu options are accessible in macOS.
• Added toggle for system tray.
• Added condition to restrict toggle of system tray when icon is hidden in the dock (ideal case)

[heyman]

Nice! Have you tested this on Windows/Linux? I suspect that app.dock might be undefined on Windows and Linux (https://www.electronjs.org/docs/latest/api/app/#appdock-macos-readonly).

[tanuj-22]

Nice! Have you tested this on Windows/Linux? I suspect that app.dock might be undefined on Windows and Linux (https://www.electronjs.org/docs/latest/api/app/#appdock-macos-readonly).

I have made the changes to the handle case for other platforms and have tested it on Mac and Windows. As of now, the toggle is visible only on Mac. The system tray would be visible on all platforms.

Thanks!

[heyman]

Thanks!