Revert "Crash on unobserved task exceptions again"

This reverts commit 62c31fd4d0.

ArchiSteamFarm/Program.cs

@@ -421,7 +421,10 @@ namespace ArchiSteamFarm {
 			}
 
 			await ASF.ArchiLogger.LogFatalException(e.Exception).ConfigureAwait(false);
-			await Exit(1).ConfigureAwait(false);
+
+			// Normally we should abort the application here, but many tasks are in fact failing in SK2 code which we can't easily fix
+			// Thanks Valve.
+			e.SetObserved();
 		}
 
 		private static void ParsePostInitArgs(IReadOnlyCollection<string> args) {