fix free trial button on timeout view

services/web/app/views/project/editor/pdf.jade

@@ -100,7 +100,7 @@ div.full-size.pdf(ng-controller="PdfController")
 					p
 						a.btn.btn-info(
 							href
-							ng-click="hello('compile-timeout')"
+							ng-click="startFreeTrial('compile-timeout')"
 						) #{translate("start_free_trial")}
 
 	.pdf-errors(ng-show="pdf.projectTooLarge")

services/web/public/coffee/ide/pdf/controllers/PdfController.coffee

@@ -196,6 +196,11 @@ define [
 		else
 			$scope.switchToSideBySideLayout()
 
+		$scope.startFreeTrial = (source) ->
+			ga?('send', 'event', 'subscription-funnel', 'compile-timeout', source)
+			window.open("/user/subscription/new?planCode=student_free_trial_7_days")
+			$scope.startedFreeTrial = true
+
 	App.factory "synctex", ["ide", "$http", "$q", (ide, $http, $q) ->
 		synctex =
 			syncToPdf: (cursorPosition) ->