Add HTML editor tab

Add the ability to change the body of the result view.
I have tutorials where I just need to change the HTML and don't want to use js to do it.

Breaking changes:

The cssStyles object now has new properties. If you overwrite them please add these classed to it.

I eventually will use the default plus your overwritten classes, but not there yet.

editorActions: {
	      container: '',
	      tabItem: '',
	      link: ''
	    },