Update SCH_SCREENs RTree after placing new symbol.

Fixes https://gitlab.com/kicad/code/kicad/issues/8451

eeschema/sch_screen.h

@@ -198,8 +198,6 @@ public:
     SCH_ITEM* GetItem( const wxPoint& aPosition, int aAccuracy = 0,
                        KICAD_T aType = SCH_LOCATE_ANY_T ) const;
 
-    void Place( SCH_EDIT_FRAME* frame, wxDC* DC ) { };
-
     /**
      * Initialize the #LIB_PART reference for each #SCH_COMPONENT found in this schematic
      * from the project #SYMBOL_LIB_TABLE.

eeschema/tools/sch_drawing_tools.cpp

@@ -281,6 +281,7 @@ int SCH_DRAWING_TOOLS::PlaceSymbol( const TOOL_EVENT& aEvent )
                                       &m_selectionTool->GetSelection() );
 
                 m_view->Update( symbol );
+                m_frame->GetScreen()->Update( symbol );
                 m_frame->OnModify();
 
                 SCH_COMPONENT* nextSymbol = nullptr;