ProjectTree: Always mark startup project (again)

The bold marker was lost after project tree recreation (i.e.
after the Project tree was e.g. switched to Open Documents and back)

Change-Id: If586ef98f2328b3a6fa7c107ac40e4cacb1009bb
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/projectexplorer/projectmodels.cpp

@@ -82,11 +82,10 @@ FlatModel::FlatModel(QObject *parent)
 
     SessionManager *sm = SessionManager::instance();
     connect(sm, &SessionManager::projectRemoved, this, &FlatModel::update);
-    connect(sm, &SessionManager::startupProjectChanged, this, &FlatModel::startupProjectChanged);
-
     connect(sm, &SessionManager::sessionLoaded, this, &FlatModel::loadExpandData);
     connect(sm, &SessionManager::aboutToSaveSession, this, &FlatModel::saveExpandData);
     connect(sm, &SessionManager::projectAdded, this, &FlatModel::handleProjectAdded);
+    connect(sm, &SessionManager::startupProjectChanged, this, [this] { layoutChanged(); });
     update();
 }
 
@@ -98,15 +97,6 @@ void FlatModel::setView(QTreeView *view)
     connect(m_view, &QTreeView::collapsed, this, &FlatModel::onCollapsed);
 }
 
-void FlatModel::startupProjectChanged(Project *project)
-{
-    ProjectNode *projectNode = project ? project->rootProjectNode() : nullptr;
-    if (m_startupProject == projectNode)
-        return;
-    m_startupProject = projectNode;
-    layoutChanged();
-}
-
 QVariant FlatModel::data(const QModelIndex &index, int role) const
 {
     QVariant result;
@@ -145,8 +135,10 @@ QVariant FlatModel::data(const QModelIndex &index, int role) const
         }
         case Qt::FontRole: {
             QFont font;
-            if (node == m_startupProject)
+            if (Project *project = SessionManager::startupProject()) {
-                font.setBold(true);
+                if (node == project->rootProjectNode())
+                    font.setBold(true);
+            }
             result = font;
             break;
         }

src/plugins/projectexplorer/projectmodels.h

@@ -83,7 +83,6 @@ signals:
     void renamed(const Utils::FileName &oldName, const Utils::FileName &newName);
 
 private:
-    void startupProjectChanged(Project *project);
     void nodeUpdated(ProjectExplorer::Node *node);
 
     bool filter(Node *node) const; // Returns true if node is hidden.
@@ -91,8 +90,6 @@ private:
     bool m_filterProjects = false;
     bool m_filterGeneratedFiles = true;
 
-    ProjectNode *m_startupProject = nullptr;
-
     static const QLoggingCategory &logger();
 
     void update();