Consider making Headings configurable and selectable #614
Description
Right now there is no way to configure Headings. Currently you can select text and iterate through h1, h2, h3 and text.
It would be great to allow configure allowed headings - for example h2 - h6.
Secondly I think that make it as select would be better for UX because right now user don't know which of the three supported headings is used.
