Prevent scrolling when context menu is showing on story landing page.

app/src/main/java/org/thoughtcrime/securesms/stories/landing/StoriesLandingFragment.kt

@@ -279,6 +279,12 @@ class StoriesLandingFragment : DSLSettingsFragment(layoutId = R.layout.stories_l
       },
       onAvatarClick = {
         cameraFab.performClick()
+      },
+      onLockList = {
+        recyclerView?.suppressLayout(true)
+      },
+      onUnlockList = {
+        recyclerView?.suppressLayout(false)
       }
     )
   }

app/src/main/java/org/thoughtcrime/securesms/stories/landing/StoriesLandingItem.kt

@@ -53,7 +53,9 @@ object StoriesLandingItem {
     val onGoToChat: (Model) -> Unit,
     val onSave: (Model) -> Unit,
     val onDeleteStory: (Model) -> Unit,
-    val onInfo: (Model, View) -> Unit
+    val onInfo: (Model, View) -> Unit,
+    val onLockList: () -> Unit,
+    val onUnlockList: () -> Unit
   ) : MappingModel<Model> {
     override fun areItemsTheSame(newItem: Model): Boolean {
       return data.storyRecipient.id == newItem.data.storyRecipient.id
@@ -294,7 +296,11 @@ object StoriesLandingItem {
 
     private fun displayContext(model: Model) {
       itemView.isSelected = true
-      StoryContextMenu.show(context, itemView, storyPreview, model) { itemView.isSelected = false }
+      model.onLockList()
+      StoryContextMenu.show(context, itemView, storyPreview, model) {
+        itemView.isSelected = false
+        model.onUnlockList()
+      }
     }
 
     private fun clearGlide() {