Support dismissing the dialog just with Enter.

services/web/public/coffee/ide/FeatureOnboardingController.coffee

@@ -21,3 +21,15 @@ define [
 		navToInnerStep2 = () ->
 			$scope.innerStep = 2
 			$scope.ui.leftMenuShown = true
+
+		handleKeypress = (e) ->
+			if e.keyCode == 13
+				if $scope.innerStep == 1
+					$scope.turnCodeCheckOn()
+				else
+					$scope.dismiss()
+
+		$(document).on "keypress", handleKeypress
+
+		$scope.$on "$destroy", () -> 
+			$(document).off "keypress", handleKeypress