lazy load the database sizes only when needed by the server inspector.

pglab/serverinspector/ServerInspector.cpp

@@ -9,7 +9,7 @@
 ServerInspector::ServerInspector(std::shared_ptr<OpenDatabase> open_database, QWidget *parent)
     : QWidget(parent)
 {
-    m_databasesPage = new DatabasesPage(this);
+    m_databasesPage = new DatabasesPage(open_database, this);
     m_rolesPage = new RolesPage(this);
 
     m_tabWidget = new QTabWidget(this);