Frontend.XF.GTK: different exitCode on root #3217

Job	Run time
linux-github--dotnet-and-newmono	7m 2s
linux-github--dotnet-and-newmono	7m 2s
linux-vanilla--newmono-only	8m 0s
linux-vanilla--newmono-only	8m 0s
linux-github--dotnet-and-mono	3m 54s
linux-github--dotnet-and-mono	3m 54s
linux-vanilla--stockdotnet6-and-newmono	5m 53s
linux-vanilla--stockdotnet6-and-newmono	5m 53s
linux-vanilla--stockdotnet6-and-stockmono	6m 5s
linux-vanilla--stockdotnet6-and-stockmono	6m 5s
linux-vanilla--stockmono-only	3m 42s
linux-vanilla--stockmono-only	4m 57s
linux-vanilla--stockdotnet6-only	4m 48s
linux-vanilla--stockdotnet6-only	4m 48s
macOS--dotnet6-and-mono	13m 21s
macOS--dotnet6-and-mono	13m 21s
macOS--dotnet6-only	3m 49s
macOS--dotnet6-only	3m 49s
macOS--mono-only	19m 44s
macOS--mono-only	19m 44s
windows--dotnet6-and-legacyFramework	6m 39s
windows--dotnet6-and-legacyFramework	6m 39s
windows--dotnet6-only	6m 35s
windows--dotnet6-only	6m 35s
windows--legacyFramework-only	15m 35s
windows--legacyFramework-only	15m 35s
conventions	0s
conventions	2m 5s
snap_pkg	0s
snap_pkg	6m 37s
snap_pkg_beta	0s
snap_pkg_beta	11m 49s
	3h 52m 0s

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