Update dashnav.html

public/app/features/dashboard/dashnav/dashnav.html

@@ -36,7 +36,7 @@
 		</ul>
 	</li>
 	<li ng-show="::dashboardMeta.canSave">
-		<a ng-click="saveDashboard()" bs-tooltip="'Save dashboard'" data-placement="bottom"><i class="fa fa-save"></i></a>
+		<a ng-click="saveDashboard()" bs-tooltip="'Save dashboard <br> CTRL+S'" data-placement="bottom"><i class="fa fa-save"></i></a>
 	</li>
 	<li ng-if="::showSettingsMenu" class="dropdown">
 		<a class="pointer" ng-click="hideTooltip($event)" bs-tooltip="'Manage dashboard'" data-placement="bottom" data-toggle="dropdown"><i class="fa fa-cog"></i></a>