Modals: Significantly improve the touch scrolling experience.

This particularly fixes the attachment and plugin details modals, but also improves other modals such as wpLink and interim login.

props iseulde.
fixes #31609, #31611. see #31610, #31612.


git-svn-id: https://develop.svn.wordpress.org/trunk@32073 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/css/common.css

@@ -227,6 +227,7 @@ body.modal-open {
 
 body.mobile.modal-open #wpwrap {
 	overflow: hidden;
+	position: fixed;
 	height: 100%;
 }
 
@@ -2200,6 +2201,7 @@ div.action-links {
 
 #plugin-information-scrollable {
 	overflow: auto;
+	-webkit-overflow-scrolling: touch;
 	height: 100%;
 }
 

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

@@ -19,6 +19,7 @@
 .media-frame {
 	font-family: "Open Sans", sans-serif;
 	font-size: 12px;
+	-webkit-overflow-scrolling: touch;
 }
 
 .media-frame input,