Don't show empty readme heading.
Fix some crashes.
Fix open/closed badge being scrolled out prematurely.
Consistently use the selected theme's style for dialogs.
Some string improvements.
Precalculate feed preview.

Otherwise the wiki list is unusably slow with larger wikis.
Fix warnings.

Make all loaders type safe to avoid unchecked cast warnings.
Tweak user list layouts a bit.
Make sure to preserve spaces used for formatting.