Merge pull request #1056 from tommedema/feature-styleable-events Closes #1041

added styleable events such that styling can be overwritten, resolves #1041

src/domain_abstract/model/Styleable.js

@@ -43,8 +43,8 @@ export default {
       const em = this.em;
       this.trigger(`change:style:${pr}`);
       if (em) {
-        em.trigger(`styleable:change`);
-        em.trigger(`styleable:change:${pr}`);
+        em.trigger(`styleable:change`, this, pr);
+        em.trigger(`styleable:change:${pr}`, this, pr);
       }
     });