cubicweb #650337 Autogrowing textarea does not grow on paste [open]

The textareas in cubicweb have this cool faculty of growing with text input... this does not work when pasting a large text in the area, you have play with the arrow buttons for the textarea to resize.

priorityminor
typebug
done in<not specified>
load0.300
load left0.300
closed by<not specified>