wpLink: bring back the Cancel link, improve responsive styles, see #26952

git-svn-id: https://develop.svn.wordpress.org/trunk@27510 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-editor.php

@@ -1091,6 +1091,9 @@ final class _WP_Editors {
 			<div id="wp-link-update">
 				<input type="submit" value="<?php esc_attr_e( 'Add Link' ); ?>" class="button-primary" id="wp-link-submit" name="wp-link-submit">
 			</div>
+			<div id="wp-link-cancel">
+				<a class="submitdelete deletion" href="#"><?php _e( 'Cancel' ); ?></a>
+			</div>
 		</div>
 		</form>
 		</div>