Fix expansion of tree view on newly added accounts

The change is based on 97ce20ac028660e6ae3dd0b98d4b487999d8768a

I removed a few lines of code there which are already part of fetchMore()

Fixes: #7336

src/gui/folderstatusmodel.cpp

@@ -600,6 +600,13 @@ void FolderStatusModel::fetchMore(const QModelIndex &parent)
     QTimer::singleShot(1000, this, &FolderStatusModel::slotShowFetchProgress);
 }
 
+void FolderStatusModel::resetAndFetch(const QModelIndex &parent)
+{
+    auto info = infoForIndex(parent);
+    info->resetSubs(this, parent);
+    fetchMore(parent);
+}
+
 void FolderStatusModel::slotGatherPermissions(const QString &href, const QMap<QString, QString> &map)
 {
     auto it = map.find("permissions");
@@ -1103,10 +1110,7 @@ void FolderStatusModel::slotFolderSyncStateChange(Folder *f)
     if (f->syncResult().folderStructureWasChanged()
         && (state == SyncResult::Success || state == SyncResult::Problem)) {
         // There is a new or a removed folder. reset all data
-        auto &info = _folders[folderIndex];
+        resetAndFetch(index(folderIndex));
-        auto idx = index(folderIndex);
-        info.resetSubs(this, idx);
-        fetchMore(idx);
     }
 }
 
@@ -1211,7 +1215,7 @@ void FolderStatusModel::slotNewBigFolder()
         return;
     }
 
-    _folders[folderIndex].resetSubs(this, index(folderIndex));
+    resetAndFetch(index(folderIndex));
 
     emit suggestExpand(index(folderIndex));
     emit dirtyChanged();

src/gui/folderstatusmodel.h

@@ -54,6 +54,7 @@ public:
     QModelIndex parent(const QModelIndex &child) const override;
     bool canFetchMore(const QModelIndex &parent) const override;
     void fetchMore(const QModelIndex &parent) override;
+    void resetAndFetch(const QModelIndex &parent);
     bool hasChildren(const QModelIndex &parent = QModelIndex()) const override;
 
     struct SubFolderInfo