Improve display of long isolate names on summary page

runtime/observatory/lib/src/elements/isolate/summary.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:html';
 import 'dart:async';
 import 'package:observatory/models.dart' as M;
 import 'package:observatory/src/elements/helpers/rendering_scheduler.dart';
 import 'package:observatory/src/elements/helpers/tag.dart';
 import 'package:observatory/src/elements/helpers/uris.dart';
@@ skipping 61 matching lines @@
       children = [
         new SpanElement()..text = 'loading ',
         new IsolateRefElement(_isolate, _events, queue: _r.queue)
       ];
     } else {
       children = [
         new DivElement()
           ..classes = ['flex-row']
           ..children = [
             new DivElement()
+              ..classes = ['isolate-ref-container']
               ..children = [
                 new IsolateRefElement(_isolate, _events, queue: _r.queue)
               ],
             new DivElement()..style.flex = '1',
             new DivElement()
+              ..classes = ['flex-row', 'isolate-state-container']
               ..children = [
                 new IsolateRunStateElement(_isolate, _events, queue: _r.queue),
                 new IsolateLocationElement(_isolate, _events, _scripts,
                     queue: _r.queue),
                 new SpanElement()..text = ' [',
                 new AnchorElement(href: Uris.debugger(_isolate))
                   ..text = 'debug',
                 new SpanElement()..text = ']'
               ]
           ],
         new BRElement(),
         new IsolateSharedSummaryElement(_isolate, _events, queue: _r.queue)
       ];
     }
   }
 
   Future _load() async {
     _loadedIsolate = await _isolates.get(_isolate);
     _r.dirty();
   }
 }