Cleanup the missing braced init list returns

Signed-off-by: Kevin Ottens <kevin.ottens@nextcloud.com>

.clang-tidy

@@ -3,6 +3,7 @@ Checks: '-*,
     modernize-make-shared,
     modernize-redundant-void-arg,
     modernize-replace-*,
+    modernize-return-braced-init-list,
     modernize-shrink-to-fit,
     modernize-use-auto,
     modernize-use-bool-literals,

src/gui/folderstatusmodel.cpp

@@ -483,7 +483,7 @@ QModelIndex FolderStatusModel::index(int row, int column, const QModelIndex &par
         return {};
     case RootFolder:
         if (_folders.count() <= parent.row())
-            return QModelIndex(); // should not happen
+            return {}; // should not happen
         return createIndex(row, column, const_cast<SubFolderInfo *>(&_folders[parent.row()]));
     case SubFolder: {
         auto pinfo = static_cast<SubFolderInfo *>(parent.internalPointer());

src/gui/owncloudgui.h

@@ -57,7 +57,7 @@ public:
     bool checkAccountExists(bool openSettings);
 
     static void raiseDialog(QWidget *raiseWidget);
-    static QSize settingsDialogSize() { return QSize(800, 500); }
+    static QSize settingsDialogSize() { return {800, 500}; }
     void setupOverlayIcons();
 #ifdef WITH_LIBCLOUDPROVIDERS
     void setupCloudProviders();