Fixed overflow of popover (#12814)

react/features/toolbox/components/web/Toolbox.tsx

@@ -353,9 +353,9 @@ const styles = () => {
         contextMenu: {
             position: 'relative' as const,
             right: 'auto',
-            maxHeight: 'inherit',
             margin: 0,
-            marginBottom: '8px'
+            marginBottom: '8px',
+            maxHeight: '80vh'
         },
 
         hangupMenu: {