Bugfixes:
- CC2Edit: Support launching CC2 via Proton instead of WINE for playtesting on Linux (Thanks @TheGLander).
- CC2Edit: Fix loading maps within subdirectories from .c2g files on non-Windows systems (Thanks @TheGLander).
- CC2Edit: Use compression to fix playtesting in Lexy's Labyrinth with some large/complex maps.
- CC2Edit: Avoid excessive disk seeking when writing map data.
- CCEdit/CC2Edit: Don't hide stdout and stderr from playtest executables.