Assertion failure saving while using relative path

[CansecoDev]

Using:

• Windows 11 23H2
• Latest Development build (Sep 20, 2023)

Description:
Saving while using a relative path for the gamedata shows this error dialog, the map saves without any noticeable issue.

Reproduction steps:

• On the Global preferences select Jedi Knight Jedi Academy.
• Make sure the Engine Path is set to a relative path: ../../Academy/ for this case.
• Save a map.

[ensiform]

This error probably shouldn't happen but I think the absolute path should be entered instead of relying on the relative path since it deals with passing off the path you give to other external tools.

[Garux]

I highly doubt that tools were built with relative engine path in mind. One obvious flaw shall be with CWD != binary folder.
Can remove the assert, if everything else file dialog related works for you. Unsure what's the assert point was originally: Gtk file chooser requirement or guard user code from using non absolute path.