return to previous view after approval flow

src/lib/routing.js

@@ -3,6 +3,7 @@ import { writable, get } from 'svelte/store';
 
 export let views = writable();
 export let currentView = writable();
+export let previousView = writable();
 
 export function navigate(viewName) {
     let v = get(views)[`./views/${viewName}.svelte`].default;