fix(web-components): add scrollbar to content area on dialog to make …

…it easier to scroll

Make scrollbar appear on content area on dialog when content overflows to make it easier to scroll
through the content.

.#2868

packages/web-components/src/components/ic-dialog/ic-dialog.css

@@ -103,17 +103,11 @@
 }
 
 .content-area {
-  -ms-overflow-style: none;
-  scrollbar-width: none;
   padding: 0 var(--ic-space-md);
   margin: 0;
   overflow-y: auto;
 }
 
-.content-area::-webkit-scrollbar {
-  display: none;
-}
-
 #dialog-content {
   margin-bottom: var(--ic-space-sm);
 }