[draft] steamcompmgr: attempt to fix the OTHER hang at exit #1652
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I would want this to be a PR stacked ontop of PR #1335, but I'm not sure how to do that, and I'm starting this as a draft so @misyltoad can look at the weird-looking new code I made and offer me feedback
Attempts to address another case where gamescope can hang at exit: when Xwayland calls
handle_io_error()
Haven't tested if this fixes the remaining hang yet...