SystemMonitor: Make sure we set a model before changing column sizes

Changing a view's column metadata requires that a model is set.

Userland/Applications/SystemMonitor/ProcessStateWidget.cpp

@@ -86,9 +86,9 @@ ProcessStateWidget::ProcessStateWidget(pid_t pid)
     set_layout<GUI::VerticalBoxLayout>();
     layout()->set_margins({ 4, 4, 4, 4 });
     m_table_view = add<GUI::TableView>();
+    m_table_view->set_model(adopt_ref(*new ProcessStateModel(ProcessModel::the(), pid)));
     m_table_view->column_header().set_visible(false);
     m_table_view->column_header().set_section_size(0, 90);
-    m_table_view->set_model(adopt_ref(*new ProcessStateModel(ProcessModel::the(), pid)));
 }
 
 ProcessStateWidget::~ProcessStateWidget()