This patch implements FromIterator<SpannedString<T>> for
SpannedString<T> to make it easier to create strings programatically.
We could also use fold directly without extracting the first element,
but that would require an additional allocation.
* Fix text alignment when wrapped
This changes the `LinesIterator` to return a `width` that corresponds
with the actual total length of the chunks, rather than returning the
total available width, when a line is wrapped. This effectively reverts
20cb033b8d (I am not sure why that commit
changed it).
* Add `is_wrapped` flag to `Row`
* Fix TextArea width with wrapped rows
Co-authored-by: Alexandre Bury <alexandre.bury@gmail.com>
