Toggle on/off multiple selection using keyboard (space, enter, return)

p4#: 21327

ApplicationCode/ProjectDataModel/RimUiTreeView.h

@@ -97,8 +97,13 @@ private:
     bool hasClipboardValidData();
 
     virtual void keyPressEvent(QKeyEvent* keyEvent);
+    virtual void mousePressEvent(QMouseEvent* mouseEvent);
+
     virtual void dropEvent(QDropEvent* dropEvent);
 
+
+    bool checkAndHandleToggleOfMultipleSelection();
+
 private:
     QAction* m_pasteAction;
 };