Page Attributes 'select' elements expand beyond edge of page.

[jtsternberg]

This is the case with the wp_dropdown_pages if any of any page names are too long.
screenshots: ​http://d.pr/9TzY & ​http://d.pr/jKE

relevant code added in wp-admin.dev.css:

textarea,
input[type="text"],
input[type="password"],
input[type="file"],
input[type="button"],
input[type="submit"],
input[type="reset"],
select {
	border-width: 1px;
	border-style: solid;
	-moz-border-radius: 3px;
	-khtml-border-radius: 3px;
	-webkit-border-radius: 3px;
	border-radius: 3px;
	max-width: 100%;  /* added for select fix */
}

Duplicate of #3752 whcih, for some reason, still remains unfixed after four years.

Also duplicate of #17043.