Webots animations are broken (on Windows)

[WillB97]

Webots animation files (such as captured from run-comp-match) now record the absolute path to their associated files so copying them from a temp directory causes them to not load correctly.

[PeterJCLaw]

Hrm, this seems non-ideal. A simple fix might be to find/replace the directory in the generated files. We should also report upstream that using the absolute path makes them non-portable.

[WillB97]

This looks to not effect the MacOS version so may be a windows specific issue.

[PeterJCLaw]

Looking at a recent animation I've got on Ubuntu the issue doesn't seem present here either (the paths are all relative).

[PeterJCLaw]

Reported upstream as cyberbotics/webots#6426.