use document for jobmodel access

...instead of MainWindow

GUI/Views/JobView.cpp

@@ -30,7 +30,7 @@
 
 JobView::JobView(MainWindow* mainWindow, ProjectDocument* document)
     : m_docks(new DocksController(this))
-    , m_progressAssistant(new JobProgressAssistant(mainWindow))
+    , m_progressAssistant(new JobProgressAssistant(mainWindow, document->jobModel()))
     , m_currentItem(nullptr)
     , m_activityActions(this)
     , m_document(document)

GUI/Views/JobWidgets/JobProgressAssistant.cpp

@@ -17,11 +17,10 @@
 #include "GUI/mainwindow/mainwindow.h"
 #include <QProgressBar>
 
-JobProgressAssistant::JobProgressAssistant(MainWindow* mainWindow)
+JobProgressAssistant::JobProgressAssistant(MainWindow* mainWindow, JobModel* jobModel)
     : QObject(mainWindow), m_mainWindow(mainWindow)
 {
-    connect(m_mainWindow->jobModel(), &JobModel::globalProgress, this,
-            &JobProgressAssistant::onGlobalProgress);
+    connect(jobModel, &JobModel::globalProgress, this, &JobProgressAssistant::onGlobalProgress);
 }
 
 void JobProgressAssistant::onGlobalProgress(int progress)

GUI/Views/JobWidgets/JobProgressAssistant.h

@@ -18,13 +18,14 @@
 #include <QObject>
 
 class MainWindow;
+class JobModel;
 
 //! The JobProgressAssistant class helps JobView to visualize current progress.
 
 class JobProgressAssistant : public QObject {
     Q_OBJECT
 public:
-    JobProgressAssistant(MainWindow* mainWindow);
+    JobProgressAssistant(MainWindow* mainWindow, JobModel* jobModel);
 
 private slots:
     void onGlobalProgress(int progress);

GUI/mainwindow/mainwindow.cpp

@@ -135,11 +135,6 @@ MainWindow* MainWindow::instance()
     return s_instance;
 }
 
-JobModel* MainWindow::jobModel()
-{
-    return models()->jobModel();
-}
-
 ApplicationModels* MainWindow::models()
 {
     return m_applicationModels;