buildstatus should only show steps that have started.

The recent setStepStarted() change causes some steps
to have text set when they're created.  In those cases,
buildstatus would show the step even though it may not
have started yet.  This change causes buildstatus to
only show steps that have started.

buildbot/status/web/buildstatus.py

@@ -33,8 +33,9 @@ def content(self, request, ctx):
 
         # Display each step, starting by the last one.
         for i in range(len(build.getSteps()) - 1, -1, -1):
-            if build.getSteps()[i].getText():
-                rows.append(IBox(build.getSteps()[i]).getBox(request).td(align="center"))
+            step = build.getSteps()[i]
+            if step.isStarted() and step.getText():
+                rows.append(IBox(step).getBox(request).td(align="center"))
 
         # Display the bottom box with the build number in it.
         ctx['build'] = IBox(build).getBox(request).td(align="center")