Added multi relation dropdowns to dashbord (#363)

This change allows for a more complete combination of relation
combinations to be filtered.

tests/ui/home_page_test.py

@@ -187,9 +187,8 @@ def _get_company_relations() -> Generator:
         yield
 
 
-@pytest.mark.tim()
 def test_update_graph_data() -> None:
     graph_result, metrics_result, nodes_result, edges_result = home.update_graph_data(
-        "HAFTENDER_GESELLSCHAFTER", "GESCHAEFTSFUEHRER"
+        frozenset({"HAFTENDER_GESELLSCHAFTER"}), frozenset("GESCHAEFTSFUEHRER")
     )
     assert graph_result is not None