Allow non-outline (freeform) text

[cannibalox]

but this brings more questions :
should ### H2.2.1 yyy be a sibling of ## H2.2 xxx ?
when we write

# H2
## H2.2 xxx
### H2.2.1 yyy

do you expect the result to be

H2

H2.2 xxx

H2.2.1 yyy

or

H2

• H2.2 xxx

  • H2.2.1 yyy

?