fix: Original dashboard link from snapshot should be an a-tag, not a button (#10269) (#10283)

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

@@ -33,9 +33,9 @@
 			<i class="fa fa-save"></i>
 		</button>
 
-		<button class="btn navbar-button navbar-button--snapshot-origin" ng-if="::ctrl.dashboard.snapshot.originalUrl" ng-href="{{ctrl.dashboard.snapshot.originalUrl}}" bs-tooltip="'Open original dashboard'" data-placement="bottom">
+		<a class="btn navbar-button navbar-button--snapshot-origin" ng-if="::ctrl.dashboard.snapshot.originalUrl" href="{{ctrl.dashboard.snapshot.originalUrl}}" bs-tooltip="'Open original dashboard'" data-placement="bottom">
 			<i class="fa fa-link"></i>
-		</button>
+		</a>
 
 		<button class="btn navbar-button navbar-button--settings" ng-click="ctrl.toggleSettings()" bs-tooltip="'Settings'" data-placement="bottom" ng-show="ctrl.dashboard.meta.showSettings">
 			<i class="fa fa-cog"></i>