feat(context-pad): add delete button

See #118

lib/features/context-pad/ContextPadProvider.js

@@ -95,24 +95,19 @@ ContextPadProvider.prototype.getContextPadEntries = function(element) {
         action: function() {
           append(element, 'bpmn:TextAnnotation');
         }
+      },
+      'action.delete': {
+        imageUrl: 'data:image/png;base64,' + images.TRASH,
+        action: function(e) {
+          modeling.removeShape(element);
+        }
       }
     });
 
   }
 
-  /*
-  _.extend(actions,  {
-    'action.delete': {
-      imageUrl: 'data:image/png;base64,' + images.TRASH,
-      action: function(e) {
-        console.log('action.delete', e);
-      }
-    }
-  });
-  */
-
   return actions;
 };
 
 
-module.exports = ContextPadProvider;
+module.exports = ContextPadProvider;