linkedscene_lookat Adder

In the krpano version 1.21.2 (build 2023-12-11) there is a bug, that with existing vtours with hotspots that DO NOT have the linkedscene_lookat attribute the feature of adding a "Target Startup View" to existing hotspots is not working.
This is because krpano wants to EDIT linkedscene_lookat but it isn't there. But it also does not add it.

This Adder adds a linkedscene_lookat to all hotspots. This will allow you to edit and add a Target Startup View to your existing hotspots.

CAUTION: It adds it to ALL hotspots with a FOV of 120.0 and a hlookat 0.0 and vlookat 0.0

DISCLAIMER: This tool is working with 100% pure Javascript, nothing gets saved or transmitted. Always make a backup of your `tour.xml` before using the output of this tool!