Re-allows selection of bitmaps not owned by a footprint.

It was broken by my commit f8051d95
Fixes #13747
https://gitlab.com/kicad/code/kicad/issues/13747

pcbnew/tools/pcb_selection_tool.cpp

@@ -2,7 +2,7 @@
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
  * Copyright (C) 2013-2017 CERN
- * Copyright (C) 2018-2022 KiCad Developers, see AUTHORS.txt for contributors.
+ * Copyright (C) 2018-2023 KiCad Developers, see AUTHORS.txt for contributors.
  * @author Tomasz Wlostowski <[email protected]>
  * @author Maciej Suminski <[email protected]>
  *
@@ -2246,9 +2246,17 @@ bool PCB_SELECTION_TOOL::itemPassesFilter( BOARD_ITEM* aItem, bool aMultiSelect
         break;
 
     case PCB_BITMAP_T:
-        if( !m_filter.graphics || !m_isFootprintEditor )
+        // a bitmap living in a footprint must not be selected inside the board editor
+        if( !m_filter.graphics )
             return false;
 
+        if( !m_isFootprintEditor )
+        {
+            if( dynamic_cast<FOOTPRINT*>( aItem->GetParent() ) )
+                return false;
+        }
+
+
         break;
 
     case PCB_FP_TEXT_T: