Specs without expectations should be alerted to the user

- Add console.error to the HtmlReporter when there is a spec without any expectation
- Change the spec's link text and color to include a warning
- Create a status for specs to label them as "empty"
- console is not accessible to IE unless you have developer tools open,
  so protect against that by mocking console.

[#59424794]

src/html/_HTMLReporter.scss

@@ -12,7 +12,7 @@ $page-background-color: #eee;
 $passing-color: #007069;
 $failing-color: #ca3a11;
 $pending-color: #ba9d37;
-
+$empty-color: #eff543;
 $neutral-color: #bababa;
 
 $font-size: 11px;
@@ -152,7 +152,7 @@ body {
     color: #eee;
 
     &.failed {
-      background-color: $failing-color
+      background-color: $failing-color;
     }
 
     &.passed {
@@ -260,6 +260,10 @@ body {
         color: $failing-color;
       }
 
+      &.empty a {
+        color: $pending-color;
+      }
+
       &.pending a {
         color: $pending-color;
       }