0029674: Improvements in Inspector tool

- preferences for dock windows geometry, tree view columns and current view projection;
- ViewControl package for common functionality between plugins;
- processing Location and Orientation for external TopoDS_Shape object
- 'F5' key to update content of each plugin
- visibility column in tree view (used now only in ShapeView)
- properties child item for context (presents tree of current Filters of context)

tools/View/View_ToolBar.hxx

@@ -44,7 +44,7 @@ class View_ToolBar : public QObject
 
 public:
   //! Constructor
-  Standard_EXPORT View_ToolBar (QWidget* theParent);
+  Standard_EXPORT View_ToolBar (QWidget* theParent, const bool isUseKeepView = true);
 
   //! Destructor
   virtual ~View_ToolBar() Standard_OVERRIDE {}