emit event when mimetype are append to output area.
fix Brian and Min comment
Fixme comment + whatsnew
reorder class properties
s/model_name/_model_name
s/Underscore/_
Use waitFor instead of sleeping.
update components with font-awesome 3.2.1
font-awesome 3.2 moved resources
update css with font-awesome 3.2.1
Remove sleep from the following,

Button, float, int, multicontainer, selection widgets.
make paste focuses the pasted cell

This is to make paste behave in the same manner that insert cell above
and below currently work (inserting a new item causes that item to
receive focus).

This solves a problem where, if a user pastes below a cell whose bottom
edge is below the current viewing area, they have no indication that any
action has occurred. The same applies for paste above a cell whose top
edge is occluded.
mention msgspec versioning, and note v4.1 changes
msgspec version is 4.1
note v4.1 msg spec change in clear_output handler
Adding initial version of readout to sliders.
Finishing the readout style and functionality.
make help menu a templates

add splitline after keyboard shortcut
float external-link icon to the right

and move the 'title' to the individual elements,
so it follows hover.
put OutputArea map at the end
link to matplotlib latest.