Use star for unexposed messages

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

@@ -232,7 +232,7 @@ public class AdapterAccount extends RecyclerView.Adapter<AdapterAccount.ViewHold
                         if (account.unseen > 0)
                             sb.append(NF.format(account.unseen));
                         if (unexposed > 0)
-                            sb.append('\u207A');
+                            sb.append('\u2B51');
                         tvName.setText(context.getString(R.string.title_name_count, account.name, sb));
                     } else
                         tvName.setText(account.name);

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

@@ -356,7 +356,7 @@ public class AdapterFolder extends RecyclerView.Adapter<AdapterFolder.ViewHolder
                     sb.append(NF.format(unseen));
                 }
                 if (unexposed > 0)
-                    sb.append('\u207A');
+                    sb.append('\u2B51');
                 tvName.setText(context.getString(R.string.title_name_count,
                         folder.getDisplayName(context, folder.parent_ref), sb));
             } else

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

@@ -164,7 +164,7 @@ public class AdapterNavAccountFolder extends RecyclerView.Adapter<AdapterNavAcco
                 if (count > 0)
                     sb.append(NF.format(count));
                 if (unexposed > 0)
-                    sb.append('\u207A');
+                    sb.append('\u2B51');
                 tvItem.setText(context.getString(R.string.title_name_count, name, sb));
             }
 

app/src/main/res/values/strings.xml

@@ -571,7 +571,7 @@
     <string name="title_advanced_nav_message_count">Show number of locally stored messages in the navigation menu</string>
     <string name="title_advanced_nav_unseen_drafts">Show number of unread drafts in the navigation menu</string>
     <string name="title_advanced_nav_pinned_count">Show the number of unread messages in the pinned navigation menu</string>
-    <string name="title_advanced_show_unexposed">Show a small plus sign for accounts/folders with unseen messages</string>
+    <string name="title_advanced_show_unexposed">Show a star for accounts/folders with unseen messages</string>
     <string name="title_advanced_startup">Show on start screen</string>
     <string name="title_advanced_cards">Use card style instead of tabular style</string>
     <string name="title_advanced_category">The account category can be configured in the advanced account options via the main settings screen</string>