An important styling not included in css file

[sukrosono]

I was expecting the necessary styling as founded on the demo page are included in the /dist/css file.
It's turn out that it was separated, please let me know the reason.

At this time and for my current project. the rest css file are not used or at least not necessary as i use boostrap framework.
So the main styling i looking for is the border as it have functionality on drag and drop zone.

In conclusion, can we include the styling style.css to be included in dist file next release?