fix: iframe height for discussions sidebar (openedx#1404)

* fix: iframe height for discussions sidebar

* fix: increase adaptation brakepoint

Author: ihor-romaniuk

src/courseware/course/sidebar/sidebars/discussions/Discussions.scss

@@ -0,0 +1,5 @@
+.discussions-sidebar-frame {
+    @media (max-width: -1 + map-get($grid-breakpoints, "xl")) {
+        max-height: calc(100vh - 65px);
+    }
+}

src/courseware/course/sidebar/sidebars/discussions/DiscussionsSidebar.jsx

@@ -38,7 +38,7 @@ const DiscussionsSidebar = ({ intl }) => {
     >
       <iframe
         src={`${discussionsUrl}?inContextSidebar`}
-        className="d-flex sticky-top vh-100 w-100 border-0"
+        className="d-flex sticky-top vh-100 w-100 border-0 discussions-sidebar-frame"
         title={intl.formatMessage(messages.discussionsTitle)}
         allow="clipboard-write"
         loading="lazy"

src/index.scss

@@ -432,6 +432,7 @@
 
 // Import component-specific sass files
 @import "courseware/course/celebration/CelebrationModal.scss";
+@import "courseware/course/sidebar/sidebars/discussions/Discussions.scss";
 @import "courseware/course/sidebar/sidebars/notifications/NotificationIcon.scss";
 @import "courseware/course/sequence/lock-paywall/LockPaywall.scss";
 @import "shared/streak-celebration/StreakCelebrationModal.scss";