Media: Port date filter width fix from Gutenberg.

Ensures the entire date selection dropdown shows in the media modal.

Previously this was worked around in WordPress/gutenberg@8deaf5e in Gutenberg. This moves the rule to core, allowing the workaround to be removed in Gutenberg.

Props ianbelanger.
Fixes #44760.
See WordPress/gutenberg#2202

git-svn-id: http://develop.svn.wordpress.org/trunk@44653 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/css/media-views.css

@@ -787,6 +787,8 @@
 
 .media-frame select.attachment-filters:last-of-type {
 	margin-right: 0;
+	width: auto;
+	max-width: 100%;
 }
 
 /**