Fixed bug with auto refresh option being reset when changing relative time when…

Fixed bug with auto refresh option being reset when changing relative time when now delay is configured, Fixes #2042

public/app/features/dashboard/timeSrv.js

@@ -93,7 +93,7 @@ define([
       _.extend(this.time, time);
 
       // disable refresh if we have an absolute time
-      if (time.to !== 'now') {
+      if (time.to && time.to.indexOf('now') === -1) {
         this.old_refresh = this.dashboard.refresh || this.old_refresh;
         this.set_interval(false);
       }

public/test/specs/timeSrv-specs.js

@@ -90,6 +90,12 @@ define([
         ctx.service.setTime({from: '2011-01-01', to: 'now' });
         expect(_dashboard.refresh).to.be('10s');
       });
+
+      it('should keep refresh after relative time range is changed and now delay exists', function() {
+        _dashboard.refresh = '10s';
+        ctx.service.setTime({from: 'now-1h', to: 'now-10s' });
+        expect(_dashboard.refresh).to.be('10s');
+      });
     });
 
   });