Spring is the time for bugs... and fixes — Slipways Steam update #73358

As in nature, so in Slipways: with winter slowly receding into the past and spring waking up in the northern hemisphere, bugs are coming out of hibernation. This patch fixes two severe bugs on Apple platforms, and one logic bug: - Game startup fails (Apple): Occasionally, the Steam integration library has a hard time starting up on Apple Silicon machines. This used to hang Slipways during startup. Now, we give Steam a few seconds and if it's not able to get its act together, we start without it. - Game startup fails (Apple): Slipways used to defer initializing some Unity services until they are first needed. However, initializing them when they are first needed could hang the whole application on Apple Silicon machines. We now initialize these services earlier to avoid the issue, in exchange for a few milliseconds more of initial startup time. - Crash/hang: Using a project or other means...