Fix, improvement

app/src/main/java/eu/faircode/email/AdapterMessage.java

@@ -441,6 +441,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
             if (textSize != 0) {
                 tvFrom.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize);
                 tvSubject.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize * 0.9f);
+                tvPreview.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize * 0.9f);
                 tvBody.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize);
 
                 int px = Math.round(TypedValue.applyDimension(
@@ -1271,6 +1272,8 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                 boolean expanded = !properties.getValue("expanded", message.id);
                 properties.setValue("expanded", message.id, expanded);
 
+                ivExpander.setImageResource(expanded ? R.drawable.baseline_expand_less_24 : R.drawable.baseline_expand_more_24);
+
                 if (expanded) {
                     bindExpanded(message);
                     properties.scrollTo(getAdapterPosition(), 0);