Fix breaking spatial containers UI when spatial container is deleted

E.g. if you had some container selected in `active_container_id` and then it got deleted UI would break and won't allow to reload the spatial manger until you reload .ifc completely

src/blenderbim/blenderbim/bim/module/spatial/data.py

@@ -32,7 +32,7 @@ class SpatialData:
     @classmethod
     def load(cls):
         cls.data = {
-            "parent_container_id": cls.get_parent_container_id(),
+            "parent_container_id": cls.parent_container_id(),
             "is_directly_contained": cls.is_directly_contained(),
             "label": cls.label(),
             "references": cls.references(),
@@ -55,12 +55,12 @@ class SpatialData:
         return results
 
     @classmethod
-    def get_parent_container_id(cls):
+    def parent_container_id(cls):
         container_id = bpy.context.scene.BIMSpatialProperties.active_container_id
         if not container_id:
             return
-        container = tool.Ifc.get().by_id(container_id)
-        if container.is_a("IfcProject"):
+        container = tool.Ifc.get_entity_by_id(container_id)
+        if not container or container.is_a("IfcProject"):
             return
         return container.Decomposes[0].RelatingObject.id()
 

src/blenderbim/blenderbim/bim/module/spatial/ui.py

@@ -121,7 +121,8 @@ class BIM_PT_SpatialManager(Panel):
             row = self.layout.row()
             row.alignment = "RIGHT"
             row.operator("bim.select_decomposed_elements", icon="RESTRICT_SELECT_OFF", text="Select Children")
-            if SpatialData.data["containers"][ifc_definition_id]["type"] in ["IfcBuildingStorey", "IfcBuilding"]:
+            spatial_data = SpatialData.data["containers"].get(ifc_definition_id, None)
+            if spatial_data and spatial_data["type"] in ["IfcBuildingStorey", "IfcBuilding"]:
                 row.operator("bim.add_building_storey", icon="ADD", text="Add storey").part_class = "IfcBuildingStorey"
             row.operator("bim.delete_container", icon="X", text="Delete").container = ifc_definition_id
         self.layout.template_list(