--- a/client/src/components/SlateEditor/CategoriesTooltip.js	Thu Nov 08 16:03:28 2018 +0100
+++ b/client/src/components/SlateEditor/CategoriesTooltip.js	Tue Nov 13 16:46:15 2018 +0100
@@ -52,7 +52,6 @@
               key={ category.key }
               className="btn btn-sm text-secondary"
               style={{ backgroundColor: category.color }}
-              active={ this.isCategoryActive(category)  }
               onClick={ this.onButtonClick.bind(this, category) }>{ category.name }</button>
           )}
           </div>