respect single instrument mode in InstrumentView

GUI/View/Instrument/InstrumentView.cpp

@@ -56,9 +56,13 @@ InstrumentView::InstrumentView(QWidget* parent, ProjectDocument* document)
     mainLayout->addLayout(horizontalLayout);
 
     createWidgetsForCurrentInstrument();
+    updateSingleInstrumentMode();
 
     connect(m_instrumentListView, &InstrumentListView::instrumentSelected, this,
             &InstrumentView::createWidgetsForCurrentInstrument);
+
+    connect(m_document, &ProjectDocument::singleInstrumentModeChanged, this,
+            &InstrumentView::updateSingleInstrumentMode);
 }
 
 void InstrumentView::showEvent(QShowEvent*)
@@ -168,3 +172,8 @@ void InstrumentView::onInstrumentChangedFromExternal(const InstrumentItem* instr
     if (instrument == m_instrumentListView->currentInstrument())
         createWidgetsForCurrentInstrument();
 }
+
+void InstrumentView::updateSingleInstrumentMode()
+{
+    m_instrumentListView->setVisible(!m_document->singleInstrumentMode());
+}

GUI/View/Instrument/InstrumentView.h

@@ -40,6 +40,7 @@ private:
     void onInstrumentdescriptionEdited(const QString& t);
     void onInstrumentChangedByEditor();
     void onInstrumentChangedFromExternal(const InstrumentItem* instrument);
+    void updateSingleInstrumentMode();
 
 private:
     InstrumentListView* m_instrumentListView;