Improve display of long isolate names on summary page

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

Index: runtime/observatory/lib/src/elements/isolate/summary.dart
diff --git a/runtime/observatory/lib/src/elements/isolate/summary.dart b/runtime/observatory/lib/src/elements/isolate/summary.dart
index 82d768a837d8491488805afd1b15e32f4db9baf6..094399630f5a1fc68ada2562f50d8e26ed4b54c6 100644
--- a/runtime/observatory/lib/src/elements/isolate/summary.dart
+++ b/runtime/observatory/lib/src/elements/isolate/summary.dart
@@ -79,11 +79,13 @@ class IsolateSummaryElement extends HtmlElement implements Renderable {
           ..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,