sidebar refactor:

- support all view tabs (story, pages, resources) appearning as possible sidebar
- remove 'replay' as view, show replay if url= is set
- story: support splitter view for both sidebar/mobile and full view
- urlresources: support sidebar view, default to prefix search as default search type
- embeds: don't show sidebar for 'replayonly' embed mode

src/appmain.js

@@ -59,6 +59,7 @@ class App extends LitElement
       bottom: 0px;
       right: 0px;
       display: flex;
+      min-width: 0px;
       flex-direction: column;
     }
     wr-coll {