Add preparing build node status item and change the build status colors to be variations on a blue color

static/js/app.js

@@ -5830,6 +5830,9 @@ quayApp.directive('buildMessage', function () {
           case 'priming-cache':
             return 'Priming cache for build';
 
+          case 'build-scheduled':
+            return 'Preparing build node';
+
           case 'pushing':
             return 'Pushing image built from Dockerfile';