FE.XF.GTK: open console app with --console arg #2846

Job	Run time
macOS--dotnet6-only	4m 39s
linux-github--dotnet-and-newmono	8m 36s
macOS--dotnet6-and-mono	18m 6s
windows--dotnet6-and-legacyFramework	9m 35s
windows--dotnet6-only	10m 3s
windows--legacyFramework-only	13m 39s
linux-vanilla--newmono-only	12m 57s
linux-vanilla--stockdotnet6-and-newmono	8m 27s
linux-vanilla--stockdotnet6-and-stockmono	11m 59s
linux-vanilla--stockdotnet6-only	7m 16s
macOS--mono-only	11m 55s
linux-github--dotnet-and-mono	5m 56s
linux-vanilla--stockmono-only	7m 33s
conventions	1m 48s
snap_pkg	9m 37s
	2h 22m 6s

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