Media: Prevent URLs from overflowing their container in the media editor.

This changeset also introduces the `.word-wrap-break-word` class which can be used to apply `word-wrap: break-word` to admin elements when needed.

Props mitogh, costdev, kapilpaul, alamgircsebd, sabernhardt, anantajitjg, afercia, circlecube, SergeyBiryukov, rafiahmedd, audrasjb.
Fixes #55393.

Built from https://develop.svn.wordpress.org/trunk@53777


git-svn-id: http://core.svn.wordpress.org/trunk@53336 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/css/common-rtl.css

@@ -950,6 +950,7 @@ a#remove-post-thumbnail:hover,
 	padding: 6px 10px 8px;
 }
 
+.word-wrap-break-word,
 .misc-pub-filename {
 	word-wrap: break-word;
 }

wp-admin/css/common.css

@@ -949,6 +949,7 @@ a#remove-post-thumbnail:hover,
 	padding: 6px 10px 8px;
 }
 
+.word-wrap-break-word,
 .misc-pub-filename {
 	word-wrap: break-word;
 }