Set selectedPlacedObject null when exiting map editor

src/composables/useMapEditorComposable.ts

@@ -98,6 +98,7 @@ export function useMapEditorComposable() {
     selectedTile.value = ''
     isPlacedMapObjectPreviewEnabled.value = false
     selectedMapObject.value = null
+    selectedPlacedObject.value = null
     shouldClearTiles.value = false
     refreshMapObject.value = 0
   }