Dalitzky

Enable remove tabset header name

2

Hey is there a way to control showHeader varibale ? I'm unable to remove header name since: 1. [This code](https://github.com/caplin/FlexLayout/blob/284af6827e13ecde2de36c85541c61fc63aec1f4/src/model/TabSetNode.ts#L336) ignores undefined values. 2. [This code](https://github.com/caplin/FlexLayout/blob/e84f5d1038af090c202b0b366516ddd636867bf1/src/AttributeDefinitions.ts#L63) only change showHeader based...

Run node-java in node thread worker. * We still have to import node-java at least once in our main thread code due to [context-aware addons](https://nodejs.org/docs/latest-v16.x/api/addons.html#:~:text=to%20NODE_MODULE().-,Context%2Daware%20addons,-%23).