Attribute removed every time a workflow is saved

[nicodio]

If I manually add an attribute to an activiti tag like this:

<endEvent id="terminateendevent1" name="TerminateEndEvent"> <terminateEventDefinition activiti:terminateAll="true"></terminateEventDefinition> </endEvent>

every time I open that bpmn, modify and save it the attribute (terminateAll) disappear and I find:

<endEvent id="terminateendevent1" name="TerminateEndEvent"> <terminateEventDefinition></terminateEventDefinition> </endEvent>

(Could be good to have a terminateAll attribute checkbox on the terminateEndEvent in the plugin)