Structural UI - refactor common code to tool, fix bugs

Also revert previous change in UI - `draw_attributes` doesn't cover it and there indeed should be special handling.

src/ifcopenshell-python/ifcopenshell/api/structural/edit_structural_boundary_condition.py

@@ -16,11 +16,28 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
 import ifcopenshell
-from typing import Any
+from typing import Any, TypedDict, Literal, Union
+
+
+AttributeDict = TypedDict(
+    "AttributeDict",
+    {
+        "type": Union[
+            Literal[
+                "string",
+                "null",
+            ],
+            str,  # IFC Class.
+        ],
+        "value": Any,
+    },
+)
 
 
 def edit_structural_boundary_condition(
-    file: ifcopenshell.file, condition: ifcopenshell.entity_instance, attributes: dict[str, Any]
+    file: ifcopenshell.file,
+    condition: ifcopenshell.entity_instance,
+    attributes: dict[str, AttributeDict],
 ) -> None:
     """Edits the attributes of an IfcBoundaryCondition
 
@@ -29,6 +46,7 @@ def edit_structural_boundary_condition(
 
     :param condition: The IfcBoundaryCondition entity you want to edit
     :param attributes: a dictionary of attribute names and values.
+        Each value is represented by a dictionary.
     :return: None
     """
     for name, data in attributes.items():