Add an option to save all tabs with the [`getAllWindows`](https://developer.apple.com/documentation/safariservices/sfsafariapplication/3075404-getallwindows) method of [`SFSafariExtensionHandler`](https://developer.apple.com/documentation/safariservices/sfsafariapplication) of SafariServices on [`SafariExtensionHandler`](https://github.com/dwarvesf/session-buddy/blob/master/SessionBuddy%20Extension/SafariExtensionHandler.swift#L33 ) instead of only savings tabs returned by `getActiveWindow`.
Add an option to save all tabs with the
getAllWindowsmethod ofSFSafariExtensionHandlerof SafariServices onSafariExtensionHandlerinstead of only savings tabs returned bygetActiveWindow.