Quick Draft: Use text cursor for description label.

fixes #27766.
Built from https://develop.svn.wordpress.org/trunk@28234


git-svn-id: http://core.svn.wordpress.org/trunk@28062 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Widgets: Toggle widget arrow when widget is open/closed.

props MikeHansenMe.
fixes #26748.
Built from https://develop.svn.wordpress.org/trunk@28235


git-svn-id: http://core.svn.wordpress.org/trunk@28063 1a063a9b-81f0-0310-95a4-ce76da25c4cd