Now checking selectables for not being null

ref #91

src/components/teams/TeamDetail.svelte

@@ -22,7 +22,7 @@
   export let params;
   export let import_modal_open = false;
   $: delete_triggered = false;
-  $: save_enabled = !data_changed;
+  $: save_enabled = !data_changed && (teamdata.parentGroup != null);
   $: data_loaded = false;
   $: data_changed = JSON.stringify(teamdata) === JSON.stringify(original);
   $: sponsoring_contracts_download_open = false;