message: fix(GUI): replace Math object usage in progressButton directive
  We were using `Math.min` in a progressButton's template expression,
  however such object is not exposed to the Angular expression context.
diff: 'progress-button--striped': striped && striped != 'false'
  }">
  <span class="progress-button__content" ng-transclude></span>
  - <span class="progress-button__bar" ng-style="{ width: Math.min(100, percentage) + '%' }"></span>
  + <span class="progress-button__bar" ng-style="{ width: (percentage > 100 ? 100 : percentage) + '%' }"></span>
  </button>
  