Here I removed "rich-text" type from components. Instead "container" can
be edited when has only text or rich text children.
And any time user can drop into editablle container which will wrap all
text and rich text children into "Span" component.
Had to implement position adjustment to consider text children which do
not have representation in navigator tree and canvas dnd.
Span has temporary SpanContainer name to not conflict with existinig
Span for styled text in rich text. Will rename in other PR when remove
no longer necessary components.
Here added two component restrictions to meta.
requiredAncestors prevent inserting components outside of required ones
here restricted ListItem to always be inside of List.
invalidAncestors prevent inserting components inside of invalid ones
here prevented nested buttons
Bogdan Chadkin