Make the "Open in Cura" button on Thingiverse work by informing
the system that Cura is the application to handle URLs with the
cura scheme, and that it can handle URLs, not just local files.
This fixes this error message visible in Firefox' console when clicking
the button on the website:
Prevented navigation to “cura://open?file=https%3A%2F%2Fwww.thingiverse.com%2Fdownload%3A14134689” due to an unknown protocol.
See https://github.com/bambulab/BambuStudio/commit/62006bba30f39
The script got moved. It looks in the directory relative to __file__ for the icon and other files. Those other files also got moved, but the icons were placed in a centrally stored location. So the path needs to be updated to the new relative path.
Contributes to issue CURA-9409.
