Increase item cart height in mobile view (Fixes #8827) (#8846)

diff --git a/erpnext/public/less/erpnext.less b/erpnext/public/less/erpnext.less
index 0431848..f6482eb 100644
--- a/erpnext/public/less/erpnext.less
+++ b/erpnext/public/less/erpnext.less
@@ -321,6 +321,10 @@
 		overflow: auto;
 		border: 1px solid @border-color;
 		border-top: none;
+
+		@media (max-width: @screen-xs) {
+			height: 30vh;
+		}
 	}
 
 	.no-items-message {