Fixed folder types

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

@@ -161,7 +161,8 @@ public interface DaoFolder {
 
     @Query("UPDATE folder" +
             " SET type = '" + EntityFolder.USER + "'" +
-            " WHERE account = :account")
+            " WHERE account = :account" +
+            " AND type <> '" + EntityFolder.SYSTEM + "'")
     int setFoldersUser(long account);
 
     @Query("UPDATE folder" +

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

@@ -816,8 +816,12 @@ public class FragmentAccount extends FragmentEx {
                             }
 
                             db.folder().setFoldersUser(account.id);
+
                             for (EntityFolder folder : folders) {
                                 folder.level = EntityFolder.getLevel(separator, folder.name);
+                                if (account.prefix != null && folder.name.startsWith(account.prefix + separator))
+                                    folder.display = folder.name.substring(account.prefix.length() + 1);
+
                                 EntityFolder existing = db.folder().getFolderByName(account.id, folder.name);
                                 if (existing == null) {
                                     folder.account = account.id;

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

@@ -2025,10 +2025,10 @@ public class ServiceSynchronize extends LifecycleService {
 
                         db.folder().setFolderLevel(folder.id, level);
 
+                        // Compatibility
                         if ("Inbox_sub".equals(folder.type))
                             db.folder().setFolderType(folder.id, EntityFolder.USER);
-                        else if (EntityFolder.USER.equals(folder.type) &&
-                                type != null && !EntityFolder.USER.equals(type))
+                        if (EntityFolder.USER.equals(folder.type) && EntityFolder.SYSTEM.equals(type))
                             db.folder().setFolderType(folder.id, type);
                     }
                 }