Don't add CONSTRUCTION_GEOM to the selection.

We'll crash later after it gets freed.

Fixes https://gitlab.com/kicad/code/kicad/-/issues/20211

eeschema/tools/ee_selection_tool.cpp

@@ -2709,6 +2709,9 @@ bool EE_SELECTION_TOOL::Selectable( const EDA_ITEM* aItem, const VECTOR2I* aPos,
         break;
     }
 
+    case NOT_USED:      // Things like CONSTRUCTION_GEOM that aren't part of the model
+        return false;
+
     default:            // Suppress warnings
         break;
     }