Hide reply info in threads if the replied to post is directly above it

We use a decoration line to draw connections between threads, meaning we
don't necessarily need to mark which post replies to whom all the time.

Doing that saves us a bit of space. :)

app/src/main/java/com/keylesspalace/tusky/adapter/StatusBaseViewHolder.java

@@ -418,7 +418,7 @@ public abstract class StatusBaseViewHolder extends RecyclerView.ViewHolder {
 
     private void setReplyInfo(StatusViewData.Concrete status) {
         @Nullable String replyToAccountAcct = status.getInReplyToAccountAcct();
-        if (replyToAccountAcct == null) {
+        if (replyToAccountAcct == null || status.getHideReplyInfo()) {
             replyInfo.setVisibility(View.GONE);
             return;
         }

app/src/main/java/com/keylesspalace/tusky/components/viewthread/ViewThreadFragment.kt

@@ -223,6 +223,12 @@ class ViewThreadFragment :
                                     0
                                 )
                             }
+
+                            uiState.statusViewData.forEachIndexed { index, current ->
+                                val above = uiState.statusViewData.getOrNull(index - 1) ?: return@forEachIndexed
+                                if (above.id == current.status.inReplyToId && !current.isDetailed)
+                                    current.hideReplyInfo = true
+                            }
                         }
 
                         revealButtonState = uiState.revealButton

app/src/main/java/com/keylesspalace/tusky/viewdata/StatusViewData.kt

@@ -44,7 +44,8 @@ sealed class StatusViewData {
          * @return Whether the post is collapsed or fully expanded.
          */
         val isCollapsed: Boolean,
-        val isDetailed: Boolean = false
+        val isDetailed: Boolean = false,
+        var hideReplyInfo: Boolean = false,
     ) : StatusViewData() {
         override val id: String
             get() = status.id