Readded link in top header, Fixes #1756

public/app/features/dashboard/partials/dashboardTopNav.html

@@ -57,6 +57,11 @@
 			</ul>
 
 			<ul class="nav pull-right">
+				<li ng-show="dashboardViewState.fullscreen" class="back-to-dashboard-link">
+					<a ng-click="exitFullscreen()">
+						Back to dashboard
+					</a>
+				</li>
 				<li ng-repeat="pulldown in dashboard.nav" ng-controller="PulldownCtrl" ng-show="pulldown.enable">
 					<grafana-simple-panel type="pulldown.type" ng-cloak>
 					</grafana-simple-panel>